Verbs that end in -ize (and can also end in -ise in British English)
|British English||American English|
|authorise / authorize||authorize|
|apologise / apologize||apologize|
|civilise / civilize||civilize|
|organise / organize||organize|
|realise / realize||realize|
|recognise / recognize||recognize|
Verbs that always end in -ise (even in American English)
Verbs that always end in -ize (even in British English)
Group 4 - -yse/-yze verbs
Group 5 - marginal cases
- prize / prise - the verb prize, meaning to value something, is spelt with a Z on both sides of the Atlantic. The verb prise, meaning to use force to separate something from something else, etymologically belongs with the French -ise verbs and is spelt with an S in British English. In American English, however, it is also spelt with a Z
- exorcise - has similar roots to other -ize suffix verbs - '15th C. Middle English exorcisen, from Late Latin exorcizare, from Greek exorkizein'. But it rather looks as though it's been associated with those other verbs ending in -cise which have come directly from French, like exercise and circumcise, which always take an s. Online Etymology Dictionary lists it under -ise, calling it - 'A rare case where -ise trumps -ize on both sides of the Atlantic, perhaps by influence of exercise.' American dictionaries such as Dictionary.com generally seem to list it under the s spelling but also accept the z spelling.Strangely, Oxford Dictionaries Online list exorcise under s, while Oxford Advanced Learner's Dictionary lists it under z.
- baptize - The opposite is the case here. The -ise spelling never really caught on in Britain at all.