common apricot vs apricot tree

common apricot and apricot tree both are nouns.

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

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

common apricot: temperate zone tree bearing downy yellow to rosy fruits
apricot tree: Asian tree having clusters of usually white blossoms and edible fruit resembling the peach

Other hypernyms of common apricot include apricot.

common apricot (noun)	apricot tree (noun)
temperate zone tree bearing downy yellow to rosy fruits	Asian tree having clusters of usually white blossoms and edible fruit resembling the peach