Phaseolus lunatus vs butter-bean plant

Phaseolus lunatus and butter-bean plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phaseolus lunatus	Yes	No	No	No
butter-bean plant	Yes	No	No	No

As nouns, Phaseolus lunatus and butter-bean plant are synonyms defined as:

Phaseolus lunatus and butter-bean plant: bush bean plant cultivated especially in southern United States having small flat edible seeds

Other synonyms of Phaseolus lunatus include butter bean, lima bean, sieva bean.

Phaseolus lunatus (noun)	butter-bean plant (noun)
bush bean plant cultivated especially in southern United States having small flat edible seeds	bush bean plant cultivated especially in southern United States having small flat edible seeds