Vocabulary Series
Also see English Homophones and Common Spelling Rules for related vocabulary topics.
Key Takeaways
- The most systematic spelling differences are -our/-or (colour/color), -re/-er (centre/center), and -ise/-ize (realise/realize).
- Vocabulary differences are often in everyday items: transport (underground/subway), buildings (flat/apartment), food (biscuit/cookie).
- Grammar differences include present perfect usage (British: "Have you eaten yet?" / American: "Did you eat yet?").
- Pronunciation differs most noticeably in vowel sounds (bath /bɑːθ/ vs /bæθ/) and the non-rhotic/rhotic divide.
- Both varieties are globally understood and equally correct — choose one and use it consistently.
Test your vocabulary now: Flash Cards →
British English and American English are the two most widely taught and studied varieties of English in the world. Despite the differences — which are real and worth knowing — speakers of both varieties understand each other perfectly well in almost all contexts. The differences exist because English developed independently on two continents for over 400 years. This guide covers the 50 most practically important differences across spelling, vocabulary, pronunciation, and grammar.
Spelling Differences
Most spelling differences follow consistent patterns, making them relatively easy to learn once you know the rules:
| British | American | Pattern |
|---|---|---|
| colour, honour, favour, neighbour | color, honor, favor, neighbor | -our → -or |
| centre, theatre, litre, metre | center, theater, liter, meter | -re → -er |
| realise, organise, recognise, analyse | realize, organize, recognize, analyze | -ise → -ize |
| travelling, modelling, cancelled | traveling, modeling, canceled | -ll → -l (before suffix) |
| defence, offence, licence (n.) | defense, offense, license (n.) | -ce → -se |
| catalogue, dialogue, monologue | catalog, dialog, monolog | -ogue → -og |
| programme | program | -gramme → -gram |
| fulfil, enrol, skilful | fulfill, enroll, skillful | single -l → double -ll |
| ageing, judgement, acknowledgement | aging, judgment, acknowledgment | keeps -e in some words |
| pyjamas, tyre, kerb, draught | pajamas, tire, curb, draft | individual word differences |
Vocabulary: Everyday Life
| British | American | Meaning |
|---|---|---|
| flat | apartment | a place to live in a building |
| lift | elevator | machine that carries you up floors |
| ground floor | first floor | floor at street level |
| first floor | second floor | one floor above street level |
| garden | yard / backyard | outside area of a house |
| shop | store | place where you buy things |
| queue | line | people waiting in order |
| mobile (phone) | cell phone | portable telephone |
| post / post box | mail / mailbox | letters and their container |
| autumn | fall | season after summer |
Vocabulary: Transport
| British | American | Meaning |
|---|---|---|
| underground / tube | subway | urban rail system |
| motorway | highway / freeway | major road for fast travel |
| petrol | gas / gasoline | fuel for cars |
| boot (of a car) | trunk | storage area at back of car |
| bonnet | hood | cover over the engine |
| lorry | truck | large goods vehicle |
| caravan | trailer / RV | mobile home towed by a car |
| pavement | sidewalk | path for pedestrians |
| roundabout | traffic circle / rotary | circular junction |
| zebra crossing | crosswalk | marked pedestrian crossing |
Vocabulary: Food & Drink
| British | American | Meaning |
|---|---|---|
| biscuit | cookie | sweet baked snack |
| chips | french fries | deep-fried potato strips |
| crisps | chips | thin sliced fried potato snacks |
| sweets | candy | sugary confectionery |
| jam | jelly | fruit preserve |
| aubergine | eggplant | purple vegetable |
| courgette | zucchini | green summer squash |
| tin | can | metal food container |
| takeaway | takeout | food to eat elsewhere |
| fizzy drink | soda / pop | carbonated soft drink |
Vocabulary: Work & School
| British | American | Meaning |
|---|---|---|
| CV (curriculum vitae) | résumé / resume | document listing your work history |
| university | college / university | higher education institution |
| headteacher | principal | head of a school |
| holiday | vacation | time off work or school |
| annual leave | vacation time / PTO | paid days off |
| redundancy | layoff | losing a job due to restructuring |
| solicitor / barrister | attorney / lawyer | legal professional |
| maths | math | mathematics (subject) |
| revision | studying | reviewing material for exams |
| marks | grades | scores on academic work |
Grammar Differences
Grammar differences are less numerous than spelling/vocabulary differences, but they are noticeable:
- Present perfect vs past simple: British English strongly prefers present perfect for recent events: "Have you eaten?" American English commonly uses past simple: "Did you eat?"
- Collective nouns: British treats collective nouns as plural: "The team are playing well." American uses singular: "The team is playing well."
- Got vs gotten: American English uses "gotten" as the past participle of "get": "She has gotten better." British English uses "got".
- Shall: British English uses "shall" for first-person offers: "Shall I help?" American English rarely uses "shall".
- Different from / different to / different than: British: different from/to; American: different from/than.
- At/on the weekend: British: "at the weekend"; American: "on the weekend."
Pronunciation Notes
Key pronunciation patterns for learners:
- The "bath" vowel: British (RP): /bɑːθ/ (long "ah"); American: /bæθ/ (short "a" as in "cat"). Affects: bath, path, laugh, can't, dance, last.
- Rhotic vs non-rhotic: Standard British English does not pronounce /r/ after vowels unless followed by another vowel. Most American accents are rhotic — the /r/ is always pronounced.
- The "t" sound: In American English, /t/ between vowels sounds like /d/: butter, water, city. British English retains a clear /t/.
- Stress differences: ADdress (BrE) vs adDRESS (AmE); GArage (BrE) vs gaRAGE (AmE).
- The letter Z: British: "zed"; American: "zee."
Which Variety Should You Learn?
Both British and American English are globally understood and equally correct. The choice often depends on your context:
- IELTS / Cambridge / UK university: Learn British English spelling and grammar conventions.
- TOEFL / American university / US business: Learn American English conventions.
- General ESL / international communication: Either is fine.
The most important thing is consistency. Choose one variety and apply it throughout your writing. Mixing colour and color in the same document looks careless. Most style guides require internal consistency.
Practise British and American Vocabulary
- Flash Cards — review British/American vocabulary pairs with definitions.
- Grammar Quiz — multiple-choice questions including British vs American usage.
- Word Search — find vocabulary items from both varieties.
- Anagram — unscramble British and American vocabulary words.
Test your British vs American vocabulary
30 free interactive exercises — no sign-up required.
Try Flash Cards →Frequently Asked Questions
What are the main spelling differences between British and American English?
The main systematic differences are: -our vs -or (colour/color, honour/honor), -re vs -er (centre/center, theatre/theater), -ise vs -ize (realise/realize), double -ll vs single -l when adding suffixes (travelling/traveling), -ce vs -se (defence/defense), and -ogue vs -og (catalogue/catalog). These patterns cover hundreds of words.
What are the most confusing vocabulary differences between British and American English?
The most confusing are: British "chips" = American "french fries"; British "crisps" = American "chips"; British "biscuit" = American "cookie"; British "pants" = American "underwear" (American "pants" = British "trousers"); British "first floor" = American "second floor." These can genuinely cause miscommunication in real-life situations.
Does British English use the present perfect more than American English?
Yes. British English strongly prefers present perfect for recently completed actions: "Have you eaten yet?" / "I've just seen her." American English commonly uses past simple in the same contexts: "Did you eat yet?" / "I just saw her." Both are correct in their respective varieties. For IELTS, using present perfect in the appropriate contexts will score better.
Is "gotten" British or American English?
"Gotten" is American English past participle of "get": "She has gotten a new job." In British English, the past participle is "got": "She has got a new job." Interestingly, "gotten" was the original form and survived in America while British English dropped it. "Gotten" sounds distinctly American to British ears.
Why does British English spell words with -ise and American with -ize?
American Noah Webster standardised -ize in his 1828 dictionary based on Greek etymology. British English adopted -ise under French influence, though -ize has always been used by Oxford University Press. Both are accepted in British English. In practice, -ise is more common in everyday British writing.
What is the difference between a British and American "billion"?
Historically, British billion meant 10¹² and American billion meant 10⁹. Today, British English has adopted the American definition: a billion = 1,000,000,000. This change happened largely due to financial and media influence. The word "milliard" (10⁹ in old British usage) is now effectively obsolete.
Should I learn British or American English for IELTS?
IELTS accepts both British and American English — but you must be consistent throughout your exam. No marks are deducted for either variety used correctly and consistently. Choose whichever you are more confident in and apply it throughout your writing and speaking.
Are there grammar differences beyond verb tenses between the two varieties?
Yes: collective nouns (British: "The team are" / American: "The team is"), "shall" for first-person (common in British, rare in American), prepositions ("at the weekend" vs "on the weekend", "different to/from" vs "different than"), and "have got" vs "have" for possession.
How different are British and American pronunciation?
The biggest systematic differences are: rhotic vs non-rhotic (AmE pronounces /r/ after vowels; standard BrE does not), the "bath" vowel (/bɑːθ/ in RP vs /bæθ/ in GenAm), the "t" flap in American English (water sounds like "wader"). Despite these, British and American speakers understand each other very well in virtually all everyday contexts.
Can I mix British and American English in my writing?
In informal contexts — texts, social media, personal emails — mixing is common and not an issue. In formal writing, academic papers, professional documents, and exams, you should be consistent throughout. Switching between "colour" and "color" in the same document suggests carelessness. Most style guides require internal consistency.