Vigna sesquipedalis vs legume

Vigna sesquipedalis and legume both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vigna sesquipedalis	Yes	No	No	No
legume	Yes	No	No	No

As nouns, legume is a hypernym of Vigna sesquipedalis; that is, legume is a word with a broader meaning than Vigna sesquipedalis:

Other hypernyms of Vigna sesquipedalis include leguminous plant.

Vigna sesquipedalis (noun)	legume (noun)
South American bean having very long succulent pods	the seedpod of a leguminous plant (such as peas or beans or lentils)
	an erect or climbing bean or pea plant of the family Leguminosae
	the fruit or seed of any of various bean or pea plants consisting of a case that splits along both sides when ripe and having the seeds attach to one side of the case