carob tree vs carob

carob tree and carob both are nouns.

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

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

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

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

carob tree (noun)	carob (noun)
evergreen Mediterranean tree with edible pods; the biblical carob	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
	long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute