Home of English Grammar

Free Guide (Updated for 2023)

  • Home
  • Download Lessons
  • Grammar Rules
  • Online Exercises
  • Online Tools
    • Grammar Checker
    • Word Counter
  • Guides
  • Contact
You are here: Home / Spelling / Words ending in -ise and -ize

Words ending in -ise and -ize

July 21, 2011 - pdf

Many English words can be spelt with either –ise and –ize. In American English, the spelling with –ize is preferred. In British English, both forms are usually possible.

Examples are:

British English American English
Realize / realise Realize
Mechanize / mechanise Mechanize
Computerize / computerise Computerize
Baptize / baptise Baptize

Some words have –ise in both British and American English. Examples are:

Surprise; revise; advise; comprise; despise; compromise; exercise; supervise; televise; advertise

In American English advertize is also sometimes possible.

Exception

Capsize has –ize in both British and American English.

If you are in doubt, remember that in British English the forms with –ise are almost always possible.

Adverb formation

We normally change an adjective into an adverb by adding –ly.

Real – really
Definite – definitely
Pale – palely
Complete – completely
Right – rightly

There are some exceptions to this rule.

True – truly (NOT Truely)
Due – duly
Whole – wholly
Full – fully

Y and i

-y usually changes to –i

Happy – happily
Easy – easily
Dry – drily or dryly
Gay – gaily

Exceptions are:

Shy – shyly
Sly – slyly
Coy – coyly

Adjectives ending in consonant + le

-le changes to –ly after a consonant.

Idle – idly
Noble – nobly
Able – ably

Adjectives ending in ic

If an adjective ends in –ic, the adverb ends in –ically.

Tragic – tragically
Phonetic – phonetically

Note that public is an exception to this rule.

Public – publicly

  • Facebook
  • LinkedIn
  • Twitter
  • WhatsApp
1,191,672 
614,588 

Check Your Grammar

GrammarCheck.net - Try online
Hint → Bookmark GrammarCheck for future use.

Latest Exercises

  • Do, Does vs. Did May 21, 2023
  • Question Tags Exercise May 20, 2023
  • There Is vs. There Are May 19, 2023
  • Verbs Quiz May 18, 2023
  • Joining Words Exercise May 17, 2023
  • Comparison of Adjectives May 17, 2023
  • Prepositions Quiz May 16, 2023
  • While vs. During May 14, 2023
  • General Grammar Exercise May 13, 2023

Topics

  • Adjectives
  • Adverbs
  • Business Writing
  • Commas
  • Conjunctions
  • Creative Writing
  • Difference
  • Essay Writing
  • Exercises
  • Learning
  • Lessons
  • Nouns
  • Prepositions
  • Pronouns
  • Proofreading
  • Punctuation
  • Quiz
  • Spelling
  • Style Guide
  • Teaching
  • Terms
  • Verbs
  • Words
  • Writing

Quiz

  • Can you correct these 14 basic grammar mistakes?
  • What kind of writer are you?

Copyright © 2023 · EnglishGrammar.org
Disclaimer · Privacy Policy · Sitemap