guava vs fruit tree

guava and fruit tree both are nouns.

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

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

guava: small tropical American shrubby tree; widely cultivated in warm regions for its sweet globular yellow fruit
fruit tree: tree bearing edible fruit

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

guava (noun)	fruit tree (noun)
tropical fruit having yellow skin and pink pulp; eaten fresh or used for e.g. jellies	tree bearing edible fruit
small tropical American shrubby tree; widely cultivated in warm regions for its sweet globular yellow fruit
small tropical shrubby tree bearing small yellowish fruit