OK vs Canadian

OK and Canadian both are nouns.

Word	Noun	Adjective	Verb	Adverb
OK	Yes	No	No	Yes
Canadian	Yes	Yes	No	No

OK (noun)	Canadian (noun)
an endorsement	a river rising in northeastern New Mexico and flowing eastward across the Texas panhandle to become a tributary of the Arkansas River in Oklahoma
a state in south central United States	a native or inhabitant of Canada

OK (adjective)	Canadian (adjective)
	of or relating to Canada or its people

OK (adverb)	Canadian (adverb)
an expression of agreement normally occurring at the beginning of a sentence