Canadian spelling vs spelling

Canadian spelling and spelling both are nouns.

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

As nouns, spelling is a hypernym of Canadian spelling; that is, spelling is a word with a broader meaning than Canadian spelling:

Canadian spelling: English orthography used in Canada (characterized by 'analyze', 'centre', 'useable')
spelling: forming words with letters according to the principles underlying accepted usage

Canadian spelling (noun)	spelling (noun)
English orthography used in Canada (characterized by 'analyze', 'centre', 'useable')	forming words with letters according to the principles underlying accepted usage