babbler vs oscine bird

babbler and oscine bird both are nouns.

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

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

babbler: any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of babbler include oscine.

babbler (noun)	oscine bird (noun)
any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae	passerine bird having specialized vocal apparatus
an obnoxious and foolish and loquacious talker