dipper vs oscine bird

dipper and oscine bird both are nouns.

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

As nouns, oscine bird is a hypernym of dipper; that is, oscine bird 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 bird: passerine bird having specialized vocal apparatus

Other hypernyms of dipper include oscine.

dipper (noun)	oscine bird (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