purple apricot vs apricot tree

purple apricot and apricot tree both are nouns.

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

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

purple apricot: small hybrid apricot of Asia and Asia Minor having purplish twigs and white flowers following by inferior purple fruit
apricot tree: Asian tree having clusters of usually white blossoms and edible fruit resembling the peach

Other hypernyms of purple apricot include apricot.

purple apricot (noun)	apricot tree (noun)
small hybrid apricot of Asia and Asia Minor having purplish twigs and white flowers following by inferior purple fruit	Asian tree having clusters of usually white blossoms and edible fruit resembling the peach