Brazilian guava vs fruit tree

Brazilian guava and fruit tree both are nouns.

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

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

Brazilian guava (noun)	fruit tree (noun)
South American tree having fruit similar to the true guava	tree bearing edible fruit