widow bird vs weaver

widow bird and weaver both are nouns.

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

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

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

Other hypernyms of widow bird include weaver finch, weaverbird.

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