Please send examples of commonly misspelt words to spelling@grammarinfo.ca if you think they shd be added to this list.

accommodation

        tourism folks take note also: one night's accommodation; two or more nights' accommodation

adviser

        for the person, advisory the modifier

analysis / analyses  (noun)

analyze / analyzes   (verb)

        Here's where I part company with British English although I usually use their differentiation (see licence and practice below), and I do b/c where possible my preference is for distinction

Many of you know that Brits wd write realise/organise/authorise and Yanks realize/organize/authorize so Canadians do it both ways.  (Some are not written both ways for same function or meaning, and that's licence/license and practice/practise in which case the Canadian press uses the former (c) as a noun and the latter (s) as a verb.)

So

The reason in this case that my preference is for the American z form for the verb instead of the s is to differentiate between the noun as a plural, analyses, and the third person singular of the verb, analyzes (wch in the UK wd be the same as the plural noun.

barbecue

        as in cue; picturesque as you know is just k so (wd then be barbek if barbeque :-() you need queue for more! BBQ fine as abbreviation though

cosy

        as in rosy!

dependant

        noun, person (as in filling out income tax returns); and dependent (adjective)

develop

but

envelope

fit and fitted

        yes, there is a past tense as in knitted! forget you heard cost....

flier

        someone who flies, a pilot; as in frequent-flier points

flyer

        now used to refer to those advertising things we get in the mail

four/forty

idiosyncrasy

        don't get misled by aristocracy, plutocracy, or meritocracy; if you think of democracy, I suppose idiocracy cd be govt by idiots.....  no comment

interpret

led

        the past tense of lead, whereas read is the past tense of read (red/reed)

liaison

licence (noun); license (verb)

        so for the noun it's only singular or plural, licence or licences, whereas verbs have all sorts of forms: to license (infinitive), licensing (present participle), licensed (past participle)

liquefy

occur/occurred

per cent

        (Cdn) as in per hundred, but one word as percentage

practice (noun); practise (verb forms)

        as with licence (only singular and plural b/c a noun)

        and license (so includes licensing, licensed)

precede

        as in secede but not proceed or succeed

program

        as in computers

programme

        as in concerts

pronunciation

        as opposed to pronounce

realise/realize

        UK vs US spelling so you see both in Canada; same applies to organise/-ize, categorise/ -ize, etc., and as in analyse/analyze, wch you see IMHO above that I'd settle on s for the noun and z for the verb to avoid the same word being both noun and verb.

rarefied

supersede