gallina vs gallinaceous bird

gallina and gallinaceous bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
gallina	Yes	No	No	No
gallinaceous bird	Yes	No	No	No

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

gallina: small Asiatic wild bird; believed to be ancestral to domestic fowl
gallinaceous bird: heavy-bodied largely ground-feeding domestic or game birds

Other hypernyms of gallina include gallinacean.

gallina (noun)	gallinaceous bird (noun)
small Asiatic wild bird; believed to be ancestral to domestic fowl	heavy-bodied largely ground-feeding domestic or game birds