cacao bean vs cocoa bean

cacao bean and cocoa bean both are nouns.

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

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

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

cacao bean (noun)	cocoa 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