poultry vs guinea hen

poultry and guinea hen both are nouns.

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

As nouns, guinea hen is a hyponym of poultry; that is, guinea hen is a word with a more specific, narrower meaning than poultry:

Other hyponyms of poultry include chicken, poulet, volaille, Rock Cornish hen, dove, squab, duck, goose, turkey.

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