warbler vs oscine

warbler and oscine both are nouns.

Word	Noun	Adjective	Verb	Adverb
warbler	Yes	No	No	No
oscine	Yes	Yes	No	No

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

Other hypernyms of warbler include oscine bird.

warbler (noun)	oscine (noun)
a small active songbird	passerine bird having specialized vocal apparatus
a singer; usually a singer who adds embellishments to the song

warbler (adjective)	oscine (adjective)
	of or relating to the songbirds