olive tree vs fruit tree

olive tree and fruit tree both are nouns.

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

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

olive tree (noun)	fruit tree (noun)
a tree of the genus Olea cultivated for its fruit	tree bearing edible fruit