dipper vs oscine

dipper and oscine both are nouns.

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

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

dipper: small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
oscine: passerine bird having specialized vocal apparatus

Other hypernyms of dipper include oscine bird.

dipper (noun)	oscine (noun)
small North American diving duck; males have bushy head plumage	passerine bird having specialized vocal apparatus
small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom
a ladle that has a cup with a long handle

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