carob powder vs locust bean

carob powder and locust bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
carob powder	Yes	No	No	No
locust bean	Yes	No	No	No

carob powder (noun)	locust bean (noun)
powder from the ground seeds and pods of the carob tree; used as a chocolate substitute	long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute