cattley guava vs fruit tree

cattley guava and fruit tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
cattley guava	Yes	No	No	No
fruit tree	Yes	No	No	No

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

cattley guava (noun)	fruit tree (noun)
small tropical shrubby tree bearing deep red oval fruit	tree bearing edible fruit