cocoa bean vs cacao tree

cocoa bean and cacao tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
cocoa bean	Yes	No	No	No
cacao tree	Yes	No	No	No

As nouns, cacao tree is a hypernym of cocoa bean; that is, cacao tree is a word with a broader meaning than cocoa bean:

cocoa bean: seed of the cacao tree; ground roasted beans are source of chocolate
cacao tree: tropical American tree producing cacao beans

Other hypernyms of cocoa bean include cacao, chocolate tree, Theobroma cacao.

cocoa bean (noun)	cacao tree (noun)
seed of the cacao tree; ground roasted beans are source of chocolate	tropical American tree producing cacao beans