cocoa bean vs cacao bean

cocoa bean and cacao bean both are nouns.

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

As nouns, cocoa bean and cacao bean are synonyms defined as:

cocoa bean and cacao bean: seed of the cacao tree; ground roasted beans are source of chocolate

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