User:JackLumber/-ce / -se
Nouns ending in -ce with -se verb forms: American English and British English both retain the noun/verb distinction in advice / advise and device / devise, but American English has lost the same distinction with licence / license and practice / practise that British spelling retains. American English uses practice and license for both meanings. Also, American English has kept the Anglo-French spelling for defense and offense, which are usually defence and offence in British English; similarly there are the American pretense and British pretence; but derivatives such as defensive, offensive, and pretension are always thus spelled in both systems.
Canada and Australia
Canadian English generally follows British usage for defence and offence and mostly for licence/license as well, although licence is sometimes used for the verb; both pretence and pretense are found, as are practice and practise for both noun and verb. Australia as UK.