Japanese medlar vs fruit tree

Japanese medlar and fruit tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese medlar	Yes	No	No	No
fruit tree	Yes	No	No	No

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

Japanese medlar: evergreen tree of warm regions having fuzzy yellow olive-sized fruit with a large free stone; native to China and Japan
fruit tree: tree bearing edible fruit

Japanese medlar (noun)	fruit tree (noun)
evergreen tree of warm regions having fuzzy yellow olive-sized fruit with a large free stone; native to China and Japan	tree bearing edible fruit