cacao vs cacao bean

cacao and cacao bean both are nouns.

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

As nouns, cacao bean is a hyponym of cacao; that is, cacao bean is a word with a more specific, narrower meaning than cacao:

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

Other hyponyms of cacao include cocoa bean.

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