poultry vs gallinacean

poultry and gallinacean both are nouns.

Word	Noun	Adjective	Verb	Adverb
poultry	Yes	No	No	No
gallinacean	Yes	No	No	No

As nouns, gallinacean is a hypernym of poultry; that is, gallinacean is a word with a broader meaning than poultry:

poultry: a domesticated gallinaceous bird thought to be descended from the red jungle fowl
gallinacean: heavy-bodied largely ground-feeding domestic or game birds

Other hypernyms of poultry include gallinaceous bird.

poultry (noun)	gallinacean (noun)
a domesticated gallinaceous bird thought to be descended from the red jungle fowl	heavy-bodied largely ground-feeding domestic or game birds
flesh of chickens or turkeys or ducks or geese raised for food