primary colour vs Canadian spelling

primary colour and Canadian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
primary colour	Yes	No	No	No
Canadian spelling	Yes	No	No	No

primary colour (noun)	Canadian spelling (noun)
any of three colors from which all others can be obtained by mixing	English orthography used in Canada (characterized by 'analyze', 'centre', 'useable')