cocoa plum vs coco plum tree

cocoa plum and coco plum tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocoa plum	Yes	No	No	No
coco plum tree	Yes	No	No	No

As nouns, cocoa plum and coco plum tree are synonyms defined as:

cocoa plum and coco plum tree: small tropical American tree bearing edible plumlike fruit

Other synonyms of cocoa plum include Chrysobalanus icaco, coco plum, icaco.

cocoa plum (noun)	coco plum tree (noun)
plum-shaped whitish to almost black fruit used for preserves; tropical American	small tropical American tree bearing edible plumlike fruit
small tropical American tree bearing edible plumlike fruit