carob vs carob bean tree

carob and carob bean tree both are nouns.

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

As nouns, carob and carob bean tree are synonyms defined as:

carob and carob bean tree: evergreen Mediterranean tree with edible pods; the biblical carob

Other synonyms of carob include algarroba, carob tree, Ceratonia siliqua.

carob (noun)	carob bean tree (noun)
powder from the ground seeds and pods of the carob tree; used as a chocolate substitute	evergreen Mediterranean tree with edible pods; the biblical carob
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