leguminous plant vs legume

leguminous plant and legume both are nouns.

Word	Noun	Adjective	Verb	Adverb
leguminous plant	Yes	No	No	No
legume	Yes	No	No	No

As nouns, leguminous plant and legume are synonyms defined as:

leguminous plant and legume: an erect or climbing bean or pea plant of the family Leguminosae

leguminous plant (noun)	legume (noun)
an erect or climbing bean or pea plant of the family Leguminosae	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