mei vs apricot tree

mei and apricot tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
mei	Yes	No	No	No
apricot tree	Yes	No	No	No

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

mei: Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits
apricot tree: Asian tree having clusters of usually white blossoms and edible fruit resembling the peach

Other hypernyms of mei include apricot.

mei (noun)	apricot tree (noun)
Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits	Asian tree having clusters of usually white blossoms and edible fruit resembling the peach