breadfruit vs fruit tree

breadfruit and fruit tree both are nouns.

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

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

breadfruit: native to Pacific islands and having edible fruit with a texture like bread
fruit tree: tree bearing edible fruit

breadfruit (noun)	fruit tree (noun)
a large round seedless or seeded fruit with a texture like bread; eaten boiled or baked or roasted or ground into flour; the roasted seeds resemble chestnuts	tree bearing edible fruit
native to Pacific islands and having edible fruit with a texture like bread