widow bird vs weaverbird

widow bird and weaverbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
widow bird	Yes	No	No	No
weaverbird	Yes	No	No	No

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

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

Other hypernyms of widow bird include weaver, weaver finch.

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