mango vs fruit tree

mango and fruit tree both are nouns.

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

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

mango (noun)	fruit tree (noun)
large oval tropical fruit having smooth skin, juicy aromatic pulp, and a large hairy seed	tree bearing edible fruit
large evergreen tropical tree cultivated for its large oval fruit