grass finch vs weaver

grass finch and weaver both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass finch	Yes	No	No	No
weaver	Yes	No	No	No

As nouns, weaver is a hypernym of grass finch; that is, weaver is a word with a broader meaning than grass finch:

grass finch: usually brightly-colored Australian weaverbirds; often kept as cage birds
weaver: finch-like African and Asian colonial birds noted for their elaborately woven nests

Other hypernyms of grass finch include weaver finch, weaverbird.

grass finch (noun)	weaver (noun)
usually brightly-colored Australian weaverbirds; often kept as cage birds	finch-like African and Asian colonial birds noted for their elaborately woven nests
common North American finch noted for its evening song	a craftsman who weaves cloth