Guinea grains vs Guinea pepper

Guinea grains and Guinea pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Guinea grains	Yes	No	No	No
Guinea pepper	Yes	No	No	No

As nouns, Guinea grains and Guinea pepper are synonyms defined as:

Guinea grains and Guinea pepper: West African plant bearing pungent peppery seeds

Other synonyms of Guinea grains include Aframomum melegueta, grains of paradise, melagueta pepper.

Guinea grains (noun)	Guinea pepper (noun)
West African plant bearing pungent peppery seeds	tropical west African evergreen tree bearing pungent aromatic seeds used as a condiment and in folk medicine
	West African plant bearing pungent peppery seeds