titlark vs oscine bird

titlark and oscine bird both are nouns.

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

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

titlark: a songbird that lives mainly on the ground in open country; has streaky brown plumage
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of titlark include oscine.

titlark (noun)	oscine bird (noun)
a songbird that lives mainly on the ground in open country; has streaky brown plumage	passerine bird having specialized vocal apparatus