papaya vs fruit tree

papaya and fruit tree both are nouns.

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

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

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

papaya (noun)	fruit tree (noun)
large oval melon-like tropical fruit with yellowish flesh	tree bearing edible fruit
tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit