turkey vs domestic fowl

turkey and domestic fowl both are nouns.

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

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

turkey: large gallinaceous bird with fan-shaped tail; widely domesticated for food
domestic fowl: a domesticated gallinaceous bird thought to be descended from the red jungle fowl

Other hypernyms of turkey include fowl, poultry.

turkey (noun)	domestic fowl (noun)
large gallinaceous bird with fan-shaped tail; widely domesticated for food	a domesticated gallinaceous bird thought to be descended from the red jungle fowl
an event that fails badly or is totally ineffectual
flesh of large domesticated fowl usually roasted
a person who does something thoughtless or annoying