Phaseolus lunatus vs sieva bean

Phaseolus lunatus and sieva bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Phaseolus lunatus	Yes	No	No	No
sieva bean	Yes	No	No	No

As nouns, Phaseolus lunatus and sieva bean are synonyms defined as:

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

Other synonyms of Phaseolus lunatus include butter-bean plant, butter bean, lima bean.

Phaseolus lunatus (noun)	sieva bean (noun)
bush bean plant cultivated especially in southern United States having small flat edible seeds	small flat green bean similar to lima beans
	bush bean plant cultivated especially in southern United States having small flat edible seeds