mocker vs oscine

mocker and oscine both are nouns.

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

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

mocker: long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds
oscine: passerine bird having specialized vocal apparatus

Other hypernyms of mocker include oscine bird.

mocker (noun)	oscine (noun)
long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds	passerine bird having specialized vocal apparatus
someone who jeers or mocks or treats something with contempt or calls out in derision

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