English Compound Adjectives: A Complete Guide with Examples

Q: What are the most common compound adjective patterns in English?

The six most frequent patterns are: adjective + noun + -ed (kind-hearted), noun + past participle (hand-made), adverb + past participle (well-known), adverb + present participle (fast-moving), number + noun (three-year-old), and noun + present participle (breath-taking). Learning these patterns allows you to interpret unfamiliar compound adjectives and form new ones correctly.

Q: Why do -ly adverbs not take a hyphen in compound adjectives?

Adverbs ending in -ly already signal their grammatical role through their suffix, making a hyphen redundant. This applies even before a noun: 'a beautifully designed kitchen', 'a rapidly expanding market'. This rule is consistent across both British and American English.

Q: What is the difference between a compound adjective and a compound noun used as a modifier?

A compound adjective describes a quality of the noun ('a fast-moving train'). A compound noun used as a modifier identifies a type or category ('a train station'). Compound adjectives before nouns take hyphens, but compound noun modifiers typically do not (bus stop, football match, coffee cup).

Q: Are compound adjectives the same in British and American English?

The core rules are the same in both varieties. Minor differences exist: American English tends to hyphenate more liberally, while British English sometimes omits hyphens in established compounds. Follow the conventions of the dictionary relevant to your context: Oxford for British English, Merriam-Webster for American.

Q: How do I know if a compound should be written as one word, hyphenated, or two separate words?

New compounds typically start as two words, become hyphenated as usage grows, and may eventually merge into one word. Check a current dictionary for established compounds. For new combinations, apply the standard rules: hyphenate before a noun, do not hyphenate after a linking verb, and never hyphenate after a -ly adverb.

Q: Do compound adjectives change form to agree with the noun?

No. English adjectives, including compound adjectives, do not change form to agree with the gender or number of the noun. The same form is used in all cases: 'a well-known actor', 'well-known actors', 'a well-known actress'. Only hyphenation rules require attention.

Q: How can I practise using compound adjectives correctly?

Effective strategies include: noticing compound adjectives in authentic texts and analysing their structure; using cloze exercises where you choose the correct compound form; writing sentences using different patterns deliberately; and reviewing your own writing to check hyphenation. LexFizz's Cloze Dropdown and Flash Card exercises let you drill compound adjectives in context, for free.

Vocabulary Grammar LexFizz Team 9 min read 13 June 2026

Part of the Adjectives Series

Practise the adjectives you learn here with Adjectives grammar exercises and Flash Cards. Also see our full English Adjectives Guide for comparatives, superlatives and order rules.

Key Takeaways

A compound adjective is made of two or more words that together describe a noun: well-known, fast-growing, three-year-old.
Use a hyphen when the compound adjective comes before the noun it modifies; omit it when it comes after the noun.
The most common patterns are adjective + noun, noun + past participle, adverb + past/present participle, and number + noun.
Some compound adjectives are always written as one word (heartbroken, widespread) or always hyphenated regardless of position.
Avoiding common mistakes — such as missing hyphens before a noun or double hyphens with adverbs ending in -ly — immediately raises the quality of your written English.

Ready to test your adjective knowledge? Try Cloze Dropdown →

Compound adjectives are one of the most productive features of English vocabulary. They allow speakers to pack a great deal of descriptive information into a single pre-modifier, creating precise, economical descriptions that single-word adjectives cannot match. Understanding how to form and punctuate them correctly is essential for B1+ writing and is a reliable marker of genuine fluency at C1 and above.

What Are Compound Adjectives?

A compound adjective (also called a compound modifier or multi-word adjective) is a group of two or more words that function together as a single adjective modifying a noun. Each individual word in the compound may not have the same meaning on its own — it is the combination that creates the descriptive meaning.

a well-known author → the words well and known combine to mean "famous"

a three-year-old child → the words three, year, and old combine to express age

a fast-growing company → the words fast and growing combine to describe rate of growth

Compound adjectives are extremely common in both spoken and written English — in journalism, academic writing, business reports, and everyday conversation. Recognising and forming them correctly is a key step from intermediate to advanced proficiency.

The Hyphen Rule: Before vs After the Noun

The single most important rule for compound adjectives is about the hyphen. English uses a hyphen to show that two or more words act as one unit modifying a noun. The position of the adjective determines whether you need a hyphen.

Rule 1: Hyphenate before the noun (attributive position)

She gave a thought-provoking speech.

We need a full-time employee.

He is a well-respected professor.

Rule 2: No hyphen after the noun (predicative position)

Her speech was thought provoking.

The position is full time.

The professor is well respected.

Memory trick: Ask yourself — does the compound come directly before a noun? If yes, use a hyphen. If the compound follows a linking verb (is, was, seems, appears), no hyphen is needed.

Rule 3: Exception — adverbs ending in -ly never take a hyphen

When the first element is an adverb ending in -ly, no hyphen is used even before a noun. This is because the -ly already signals that the word is an adverb modifying what follows — a hyphen would be redundant.

a highly respected scientist (not: highly-respected)

a recently published report (not: recently-published)

a rapidly growing industry (not: rapidly-growing)

The 6 Most Common Compound Adjective Patterns

The vast majority of compound adjectives in English follow one of six predictable patterns. Learning these patterns lets you form and recognise new compounds you have never seen before.

Pattern	Structure	Examples
1. Adjective + Noun + -ed	adj + noun + -ed	kind-hearted, narrow-minded, short-sighted, cold-blooded, open-minded, warm-hearted
2. Noun + Past Participle	noun + -ed / irregular	sun-dried, hand-made, home-grown, store-bought, self-taught, air-conditioned
3. Adverb + Past Participle	adverb + -ed / irregular	well-known, well-paid, badly-designed, long-established, newly-built, much-needed
4. Adverb + Present Participle	adverb + -ing	fast-moving, hard-working, easy-going, far-reaching, long-lasting, time-consuming
5. Number + Noun	number + noun (+ -ed)	five-star, two-bedroom, three-year-old, four-wheel-drive, six-figure, ten-minute
6. Noun + Present Participle	noun + -ing	breath-taking, mouth-watering, record-breaking, heart-warming, mind-blowing, eye-catching

50+ Compound Adjective Examples by Category

The following examples are grouped by context so you can learn them in meaningful clusters.

Describing People and Character

Compound adjective	Meaning	Example sentence
open-minded	willing to consider new ideas	"We need an open-minded approach to solve this."
narrow-minded	unwilling to consider new ideas	"His narrow-minded attitude frustrated the team."
hard-working	putting in great effort	"She is one of the most hard-working students I know."
easy-going	relaxed, not easily upset	"He has an easy-going personality that everyone likes."
self-confident	having belief in one's own abilities	"The presentation required a self-confident speaker."
absent-minded	forgetful, lacking concentration	"The absent-minded professor forgot his keys again."

Describing Work and Business

Compound adjective	Meaning	Example sentence
full-time	for the whole working week	"She accepted a full-time position at the firm."
part-time	for fewer than the standard hours	"He took a part-time job while studying."
well-paid	receiving a good salary	"Engineering is a well-paid profession."
long-established	existing for a long time	"It is a long-established company with a strong reputation."
fast-growing	expanding rapidly	"The fast-growing tech sector is creating thousands of jobs."
cost-effective	giving good value for money	"We need a cost-effective solution for the problem."

Describing Products and Objects

Compound adjective	Meaning	Example sentence
hand-made	made by hand, not by machine	"She bought a beautiful hand-made scarf."
state-of-the-art	using the latest technology	"The laboratory has state-of-the-art equipment."
energy-efficient	using little energy to operate	"The new energy-efficient model cuts electricity costs."
ready-made	prepared in advance, off the shelf	"They sell ready-made meals for busy professionals."
built-in	included as an integral part	"The laptop has a built-in camera and microphone."
second-hand	previously owned by someone else	"He found a second-hand bicycle in excellent condition."

Describing Situations and Events

Compound adjective	Meaning	Example sentence
long-awaited	waited for over a long time	"The long-awaited report was finally published."
well-known	familiar to many people; famous	"He is a well-known author in the science fiction genre."
record-breaking	surpassing all previous records	"The race ended with a record-breaking finish."
thought-provoking	causing careful thought	"It was a thought-provoking documentary."
far-reaching	having a wide influence or effect	"The policy will have far-reaching consequences."
ground-breaking	innovative; pioneering	"The ground-breaking research changed the field."

Always Written as One Word

Some compound adjectives have been used so frequently that they have merged into a single word. These are not hyphenated at all — they are written as one unit regardless of their position in the sentence.

Common one-word compound adjectives

heartbroken — "She was heartbroken after the news."
widespread — "There is widespread support for the proposal."
straightforward — "The instructions are perfectly straightforward."
overwhelming — "The response was overwhelming."
outstanding — "He gave an outstanding performance."
upbeat — "She remained upbeat despite the setback."
overworked — "The overworked staff needed a break."
underrated — "That film is seriously underrated."

When in doubt: If you are unsure whether a compound is hyphenated or written as one word, check a reliable dictionary. Both the Oxford English Dictionary and Cambridge Dictionary give guidance on hyphenation for specific entries.

Common Mistakes to Avoid

Even advanced learners make predictable errors with compound adjectives. Knowing these pitfalls in advance helps you write more accurately from the start.

Mistake 1: Missing the hyphen before a noun

✗ "It was a well known fact." → ✓ "It was a well-known fact."

✗ "She has a part time job." → ✓ "She has a part-time job."

Mistake 2: Adding a hyphen after a linking verb

✗ "The report is well-known." → ✓ "The report is well known."

✗ "Her job is part-time." → ✓ "Her job is part time."

Mistake 3: Hyphenating -ly adverb compounds

✗ "a highly-effective strategy" → ✓ "a highly effective strategy"

✗ "a newly-appointed manager" → ✓ "a newly appointed manager"

Quick test: If the first word ends in -ly, remove the hyphen. If it does not end in -ly and comes before a noun, add the hyphen. This two-step check catches the majority of errors.

Mistake 4: Forgetting to make nouns singular in number compounds

When a number is combined with a noun to form a compound adjective, the noun stays singular even when the number is greater than one.

✗ "a three-years-old child" → ✓ "a three-year-old child"

✗ "a two-weeks holiday" → ✓ "a two-week holiday"

✗ "a five-pages document" → ✓ "a five-page document"

Put your adjective skills to the test

Try our interactive Cloze Dropdown exercises to practise compound adjectives in context — free and no sign-up needed.

Start Cloze Dropdown →

Frequently Asked Questions

What is a compound adjective?

A compound adjective is two or more words that work together as a single adjective to modify a noun. For example, in "a fast-moving car", the words fast and moving combine to describe the noun "car". Compound adjectives are extremely common in English and appear across all registers — from everyday conversation to academic writing and journalism. They allow writers to express precise descriptions efficiently without needing additional clauses or sentences.

When do you use a hyphen in a compound adjective?

Use a hyphen when the compound adjective comes directly before the noun it modifies (attributive position): "a well-known scientist". Do not use a hyphen when it comes after a linking verb (predicative position): "The scientist is well known". The key exception is adverbs ending in -ly: these never take a hyphen even before a noun ("a highly effective method", not "a highly-effective method").

What are the most common compound adjective patterns in English?

The six most frequent patterns are: (1) adjective + noun + -ed (kind-hearted), (2) noun + past participle (hand-made), (3) adverb + past participle (well-known), (4) adverb + present participle (fast-moving), (5) number + noun (three-year-old), and (6) noun + present participle (breath-taking). Learning to recognise these patterns allows you to interpret unfamiliar compound adjectives correctly and form new ones yourself.

Why do -ly adverbs not take a hyphen in compound adjectives?

Adverbs ending in -ly already signal their grammatical role through their suffix — readers understand immediately that the adverb modifies the following word. A hyphen would be redundant and is not used by convention. This applies even when the compound comes before a noun: "a beautifully designed kitchen", "a rapidly expanding market", "a carefully worded statement". This rule is consistent across British and American English.

Can a compound adjective have three or more words?

Yes. Multi-word compound adjectives of three or more words are common, particularly with numbers and in technical or journalistic contexts. Examples include: "a three-year-old child", "a state-of-the-art laboratory", "a four-wheel-drive vehicle", "an over-the-counter remedy", and "an up-to-date report". Each element is joined by hyphens when the compound precedes the noun. When it follows a linking verb, the hyphens are dropped: "The report is up to date."

What is the difference between a compound adjective and a compound noun used as a modifier?

A compound adjective describes a quality of the noun ("a fast-moving train" — fast-moving describes the train's movement). A compound noun used as a modifier identifies a type or category of noun ("a train station" — train tells us what type of station). The distinction matters for hyphenation: compound adjectives before nouns take hyphens, but compound noun modifiers typically do not (e.g., "bus stop", "football match", "coffee cup").

Are compound adjectives the same in British and American English?

The core rules for forming compound adjectives are the same in both varieties. However, there are minor differences in hyphenation preferences: American English tends to hyphenate more liberally, while British English sometimes omits hyphens in established compounds. For example, "first-rate" is hyphenated in both varieties, but American publications may hyphenate compounds that British ones leave open. When in doubt, follow the conventions of the dictionary or style guide relevant to your context (Oxford for British English, Merriam-Webster for American).

How do I know if a compound should be written as one word, hyphenated, or two separate words?

This depends on the stage of development of the compound. New compounds typically start as two separate words ("over worked"), become hyphenated as they are used more ("over-worked"), and may eventually merge into one word ("overworked"). The safest approach is to check a current dictionary for established compounds. For newly coined combinations, apply the standard hyphen rules: hyphenate before a noun, do not hyphenate after a linking verb, and never hyphenate after a -ly adverb.

Do compound adjectives change form to agree with the noun?

No. Unlike adjectives in many other European languages (French, Spanish, German), English adjectives — including compound adjectives — do not change form to agree with the gender or number of the noun. The same form is used regardless: "a well-known actor", "well-known actors", "a well-known actress". This makes compound adjectives considerably easier to use than their equivalents in grammatical-gender languages, though the hyphenation rules still require attention.

How can I practise using compound adjectives correctly?

The most effective practice strategies are: (1) noticing compound adjectives in authentic texts such as newspaper articles, reports, and novels and analysing their structure; (2) using cloze exercises where you must choose the correct compound form; (3) writing sentences that deliberately use different patterns (number + noun, adverb + past participle, etc.); and (4) reviewing your own writing to check hyphenation. LexFizz's Cloze Dropdown and Flash Card exercises let you drill vocabulary including compound adjectives in context, immediately and for free.