carob powder vs Saint-John's-bread

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

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

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

carob powder 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 powder include carob.

carob powder (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