carob vs Saint-John's-bread

carob and Saint-John's-bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
carob	Yes	No	No	No
Saint-John's-bread	Yes	No	No	No

As nouns, carob and Saint-John's-bread are synonyms defined as:

carob and Saint-John's-bread: powder from the ground seeds and pods of the carob tree; used as a chocolate substitute

Other synonyms of carob include carob powder.

carob (noun)	Saint-John's-bread (noun)
powder from the ground seeds and pods of the carob tree; used as a chocolate substitute	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