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American vs British Spelling

Common spelling differences: -ize/-ise, -or/-our, -er/-re

beginner

When to Use American vs British Spelling

  • •-or (US) vs -our (UK): color/colour, honor/honour, favor/favour
  • •-er (US) vs -re (UK): center/centre, theater/theatre, meter/metre
  • •-ize (US) vs -ise (UK): organize/organise, realize/realise
  • •-og (US) vs -ogue (UK): catalog/catalogue, dialog/dialogue
  • •Double letters: traveled/travelled, canceled/cancelled

How to Form American vs British Spelling

Affirmative (+)

Choose one system and be consistent throughout your writing

Negative (-)

N/A

Question (?)

N/A

💡 Neither is 'correct'—both are valid. Choose based on your audience and be consistent.

Examples of American vs British Spelling

✓The color of the car is red. (US) / The colour of the car is red. (UK)

✗The colour of the car is red and I like the color blue.

Don't mix spellings—be consistent.

✓The theater is in the center of town. (US)

✗The theatre is in the center of town.

Use either US or UK spellings consistently.

✓She travelled to London. (UK) / She traveled to London. (US)

✗N/A

Both are correct in their respective varieties.

Common Mistakes with American vs British Spelling

💡 Practice Tips for American vs British Spelling

  • • -our (UK) → -or (US): colour/color, honour/honor
  • • -re (UK) → -er (US): centre/center, metre/meter
  • • -ise (UK) → -ize (US): realise/realize (note: some UK words always use -ize)
  • • -lled (UK) → -led (US): travelled/traveled
  • • Pick one system for your document and stick to it
Quick Quiz
  1. 1.Which is the British English spelling of 'color'? 
  2. 2.Which is the American English spelling of 'centre'? 
  3. 3.Which sentence mixes American and British spelling inconsistently? 
  4. 4.Which is the British spelling of the verb 'organize'? 
  5. Question 5: Rewrite in American English: 'She travelled to London.' → 'She blank to London.'
    5.Rewrite in American English: 'She travelled to London.' → 'She to London.'
  6. Question 6: Rewrite in British English: 'Read the dialog.' → 'Read the blank.'
    6.Rewrite in British English: 'Read the dialog.' → 'Read the .'
  7. Question 7: Rewrite in British English: 'I favor the new plan.' → 'I blank the new plan.'
    7.Rewrite in British English: 'I favor the new plan.' → 'I the new plan.'
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