carob tree vs Ceratonia siliqua

carob tree and Ceratonia siliqua both are nouns.

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

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

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

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

carob tree (noun)	Ceratonia siliqua (noun)
evergreen Mediterranean tree with edible pods; the biblical carob	evergreen Mediterranean tree with edible pods; the biblical carob