favourite vs Canadian spelling

favourite and Canadian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
favourite	Yes	Yes	Yes	No
Canadian spelling	Yes	No	No	No

favourite (noun)	Canadian spelling (noun)
something regarded with special favor or liking	English orthography used in Canada (characterized by 'analyze', 'centre', 'useable')
a special loved one
a competitor thought likely to win

favourite (adjective)	Canadian spelling (adjective)
preferred above all others and treated with partiality
appealing to the general public

favourite (verb)	Canadian spelling (verb)
To mark an item as a personal favorite on social media