guinea fowl vs domestic fowl

guinea fowl and domestic fowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
guinea fowl	Yes	No	No	No
domestic fowl	Yes	No	No	No

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

guinea fowl: a west African bird having dark plumage mottled with white; native to Africa but raised for food in many parts of the world
domestic fowl: a domesticated gallinaceous bird thought to be descended from the red jungle fowl

Other hypernyms of guinea fowl include fowl, poultry.

guinea fowl (noun)	domestic fowl (noun)
a west African bird having dark plumage mottled with white; native to Africa but raised for food in many parts of the world	a domesticated gallinaceous bird thought to be descended from the red jungle fowl