pawpaw vs fruit tree

pawpaw and fruit tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
pawpaw	Yes	No	No	No
fruit tree	Yes	No	No	No

As nouns, fruit tree is a hypernym of pawpaw; that is, fruit tree is a word with a broader meaning than pawpaw:

pawpaw: tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit
fruit tree: tree bearing edible fruit

pawpaw (noun)	fruit tree (noun)
fruit with yellow flesh; related to custard apples	tree bearing edible fruit
small tree native to the eastern United States having oblong leaves and fleshy fruit
tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit