pitanga vs fruit tree

pitanga and fruit tree both are nouns.

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

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

pitanga: Brazilian tree with spicy red fruit; often cultivated in California and Florida
fruit tree: tree bearing edible fruit

pitanga (noun)	fruit tree (noun)
Brazilian tree with spicy red fruit; often cultivated in California and Florida	tree bearing edible fruit