redwing vs blackbird

redwing and blackbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
redwing	Yes	No	No	No
blackbird	Yes	No	No	No

As nouns, blackbird is a hypernym of redwing; that is, blackbird is a word with a broader meaning than redwing:

redwing: North American blackbird with scarlet patches on the wings
blackbird: any bird of the family Icteridae whose male is black or predominantly black

Other hypernyms of redwing include New World blackbird.

redwing (noun)	blackbird (noun)
small European thrush having reddish flanks	any bird of the family Icteridae whose male is black or predominantly black
North American blackbird with scarlet patches on the wings	common black European thrush