Quick answer: Expand means to become larger, or to make something larger or more detailed: The company expanded into new markets. Expend means to use up or spend money, energy, time, or effort: They expended a great deal of effort on the project. Memory trick: expaNd has an N for growiNg, while expeNd ends the same way but pairs with speNd — expend and spend both mean "using something up." For a fuller definition, see the Cambridge Dictionary entry for ‘expand’.
Comparison Table
| Word | Part of Speech | Meaning | Example |
|---|---|---|---|
| expand | verb | to become larger, or to make something larger or more detailed | The business expanded rapidly last year. |
| expend | verb | to use up or spend money, time, energy, or effort | She expended all her savings on the renovation. |
Using Expand
Expand means to increase in size, volume, or scope, or to make something bigger, longer, or more detailed. It can be used for physical objects, businesses, ideas, and explanations alike. It is often followed by prepositions such as into, on, or upon.
The company expanded into new international markets.
Metal tends to expand when it is heated.
Could you expand on that point, please?
The city has expanded enormously over the past decade.
We plan to expand our product range next year.
Common Collocations with Expand
- expand on / upon (an idea) — to give more detail
- expand into (new markets/territory)
- rapidly / gradually expand
- expansion (the noun form)
Using Expend
Expend means to use up or consume a resource such as money, time, energy, or effort, typically because it takes considerable exertion to achieve something. It is more formal than everyday verbs like spend or use, and it appears frequently in business, scientific, and academic writing. Note that expend follows the same verb-formation pattern taught on our verb patterns page, where verbs commonly combine with objects and prepositional phrases to show what is being used and how.
The team expended considerable energy preparing the report.
They expended most of the budget on marketing.
The runners expended their remaining strength in the final lap.
Governments expend vast sums on public infrastructure.
He expended so much effort that he had nothing left for the interview.
Common Collocations with Expend
- expend energy / effort / resources
- expend a great deal of (time/money)
- expenditure (the noun form, meaning money spent)
- expendable (adjective, meaning able to be used up or not essential)
Memory Trick
Think of the extra A in expAnd as standing for "Add size" — things that expand get bigger. Think of expeNd rhyming with speNd — both describe using something up, whether it's money, energy, or time. If a sentence is about growth or increase, use expand; if it's about consuming or using up resources, use expend.
Common Mistakes
✗ The company plans to expend into Asian markets.
✓ The company plans to expand into Asian markets.
✗ They expanded all their energy finishing the race.
✓ They expended all their energy finishing the race.
✗ The company's expenditure into Europe was a success.
✓ The company's expansion into Europe was a success.
Mini-Quiz
Test your understanding with an interactive exercise:
- Grammar Quiz — choose the correct word in multiple-choice questions.
- Cloze Dropdown — fill in the blank with expand or expend.
Quick Check: Expand or Expend?
Four questions — choose the correct word for each sentence.
1. “The company plans to ___ into new markets.”
2. “They ___ a huge amount of effort on the project.”
3. “Metal will ___ when heated.”
4. “Which word rhymes with ‘spend’ in meaning?”
Frequently Asked Questions
What is the difference between expand and expend?
Expand means to become larger, or to make something larger, longer, or more detailed: "The company expanded into new markets." Expend means to use up or spend a resource such as money, time, or effort: "They expended a great deal of effort on the project." The words are spelled almost identically but describe opposite ideas — growth versus consumption.
Is expend a formal word?
Yes, expend is more formal than everyday alternatives like "spend" or "use up." It appears frequently in business reports, scientific writing, and academic essays: "The researchers expended considerable resources on data collection." In casual conversation, native speakers are more likely to say "spend" or "use up" instead of "expend."
What are the noun forms of expand and expend?
The noun form of expand is expansion: "the company's expansion into Europe." The noun form of expend is expenditure, which usually refers specifically to money spent: "government expenditure on healthcare." These nouns are not interchangeable — expansion is about growth, expenditure is about spending.
Can "expand" mean to explain something in more detail?
Yes. "Expand on" or "expand upon" means to give more detail or elaborate on an idea: "Could you expand on that point?" This is a very common use in academic discussions, meetings, and interviews, distinct from the physical sense of expand meaning to grow in size.
What does "expendable" mean?
Expendable is an adjective meaning able to be used up, spent, or treated as not essential: "In this budget, travel costs are the first expendable item." It can also describe people or things considered unimportant enough to sacrifice: "The soldiers felt they were treated as expendable." There is no equivalent adjective "expandable" with the same nuance — expandable simply means capable of being made larger.
What are common collocations with expand?
Common collocations include: expand rapidly/gradually, expand into (new markets, new territory), expand a business/company, expand on/upon (an idea, a point), and expand your knowledge/vocabulary/horizons. Expand is frequently used metaphorically for growth in scope, influence, or understanding, not only physical size.
What are common collocations with expend?
Common collocations include: expend energy/effort/resources, expend a great deal of (time, money, strength), and fully expend (used up completely). Expend nearly always pairs with something considered a limited or valuable resource that gets consumed through use.
Does metal expand or expend when heated?
Metal expands when heated — it physically increases in size because the heat causes its molecules to move further apart. This is a fundamental principle in physics and engineering, taught in science classes worldwide: "Railway tracks are built with small gaps because metal expands in hot weather." Expend would be incorrect here, since nothing is being used up.
How can I remember expand vs expend?
Link expAnd to "Add" — both start with A, and expanding means adding size. Link expEnd to "spEnd" — both rhyme and both mean using something up. If your sentence is about something getting bigger, choose expand; if it's about using up money, time, or energy, choose expend.
Is it correct to say "expend energy" or "expand energy"?
The correct phrase is "expend energy," meaning to use up energy through physical or mental effort: "Runners expend a lot of energy during a marathon." "Expand energy" is incorrect, because energy is consumed, not made larger. This is one of the most common errors learners make with this word pair, since both verbs can appear before the same type of noun.