canary bird vs finch

canary bird and finch both are nouns.

Word	Noun	Adjective	Verb	Adverb
canary bird	Yes	No	No	No
finch	Yes	No	No	No

As nouns, finch is a hypernym of canary bird; that is, finch is a word with a broader meaning than canary bird:

canary bird: any of several small Old World finches
finch: any of numerous small songbirds with short stout bills adapted for crushing seeds

canary bird (noun)	finch (noun)
any of several small Old World finches	any of numerous small songbirds with short stout bills adapted for crushing seeds