waxwing vs oscine bird

waxwing and oscine bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
waxwing	Yes	No	No	No
oscine bird	Yes	No	No	No

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

waxwing: brown velvety-plumaged songbirds of the Northern Hemisphere having crested heads and red waxy wing tips
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of waxwing include oscine.

waxwing (noun)	oscine bird (noun)
brown velvety-plumaged songbirds of the Northern Hemisphere having crested heads and red waxy wing tips	passerine bird having specialized vocal apparatus