carob vs bean tree

carob and bean tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
carob	Yes	No	No	No
bean tree	Yes	No	No	No

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

carob (noun)	bean tree (noun)
powder from the ground seeds and pods of the carob tree; used as a chocolate substitute	any of several trees having seedpods as fruits
evergreen Mediterranean tree with edible pods; the biblical carob
long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute