oscine vs oscine bird

oscine and oscine bird both are nouns.

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

As nouns, oscine and oscine bird are synonyms defined as:

oscine and oscine bird: passerine bird having specialized vocal apparatus

oscine (noun)	oscine bird (noun)
passerine bird having specialized vocal apparatus	passerine bird having specialized vocal apparatus

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