widow bird vs weaver finch

widow bird and weaver finch both are nouns.

Word	Noun	Adjective	Verb	Adverb
widow bird	Yes	No	No	No
weaver finch	Yes	No	No	No

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

widow bird: mostly black African weaverbird
weaver finch: finch-like African and Asian colonial birds noted for their elaborately woven nests

Other hypernyms of widow bird include weaver, weaverbird.

widow bird (noun)	weaver finch (noun)
mostly black African weaverbird	finch-like African and Asian colonial birds noted for their elaborately woven nests