guinea hen vs poultry

guinea hen and poultry both are nouns.

Word	Noun	Adjective	Verb	Adverb
guinea hen	Yes	No	No	No
poultry	Yes	No	No	No

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

guinea hen (noun)	poultry (noun)
female guinea fowl	a domesticated gallinaceous bird thought to be descended from the red jungle fowl
flesh of a guinea fowl (especially of hens)	flesh of chickens or turkeys or ducks or geese raised for food