mulberry tree vs fruit tree

mulberry tree and fruit tree both are nouns.

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

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

mulberry tree: any of several trees of the genus Morus having edible fruit that resembles the blackberry
fruit tree: tree bearing edible fruit

mulberry tree (noun)	fruit tree (noun)
any of several trees of the genus Morus having edible fruit that resembles the blackberry	tree bearing edible fruit