negro pepper vs Xylopia aethiopica

negro pepper and Xylopia aethiopica both are nouns.

Word	Noun	Adjective	Verb	Adverb
negro pepper	Yes	No	No	No
Xylopia aethiopica	Yes	No	No	No

As nouns, negro pepper and Xylopia aethiopica are synonyms defined as:

negro pepper and Xylopia aethiopica: tropical west African evergreen tree bearing pungent aromatic seeds used as a condiment and in folk medicine

Other synonyms of negro pepper include Guinea pepper.

negro pepper (noun)	Xylopia aethiopica (noun)
tropical west African evergreen tree bearing pungent aromatic seeds used as a condiment and in folk medicine	tropical west African evergreen tree bearing pungent aromatic seeds used as a condiment and in folk medicine