breadfruit tree vs fruit tree

breadfruit tree and fruit tree both are nouns.

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

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

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

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