swallow shrike vs oscine bird

swallow shrike and oscine bird both are nouns.

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

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

swallow shrike: Australasian and Asiatic bird related to the shrikes and resembling a swallow
oscine bird: passerine bird having specialized vocal apparatus

Other hypernyms of swallow shrike include oscine.

swallow shrike (noun)	oscine bird (noun)
Australasian and Asiatic bird related to the shrikes and resembling a swallow	passerine bird having specialized vocal apparatus