Vigna sinensis vs cowpea plant

Vigna sinensis and cowpea plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vigna sinensis	Yes	No	No	No
cowpea plant	Yes	No	No	No

As nouns, Vigna sinensis and cowpea plant are synonyms defined as:

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

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

Vigna sinensis (noun)	cowpea plant (noun)
sprawling Old World annual cultivated especially in southern United States for food and forage and green manure	sprawling Old World annual cultivated especially in southern United States for food and forage and green manure