Vigna unguiculata vs cowpea

Vigna unguiculata and cowpea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vigna unguiculata	Yes	No	No	No
cowpea	Yes	No	No	No

As nouns, Vigna unguiculata and cowpea are synonyms defined as:

Vigna unguiculata and cowpea: sprawling Old World annual cultivated especially in southern United States for food and forage and green manure

Other synonyms of Vigna unguiculata include black-eyed pea, cowpea plant, Vigna sinensis.

Vigna unguiculata (noun)	cowpea (noun)
sprawling Old World annual cultivated especially in southern United States for food and forage and green manure	eaten fresh as shell beans or dried
	sprawling Old World annual cultivated especially in southern United States for food and forage and green manure
	fruit or seed of the cowpea plant