nutcracker vs oscine bird

nutcracker and oscine bird both are nouns.

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

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

nutcracker: any of various small short-tailed songbirds with strong feet and a sharp beak that feed on small nuts and insects
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of nutcracker include oscine.

nutcracker (noun)	oscine bird (noun)
speckled birds that feed on nuts	passerine bird having specialized vocal apparatus
any of various small short-tailed songbirds with strong feet and a sharp beak that feed on small nuts and insects
a compound lever used to crack nuts open