sieva bean vs Phaseolus lunatus

sieva bean and Phaseolus lunatus both are nouns.

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

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

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

Other synonyms of sieva bean include butter-bean plant, butter bean, lima bean.

sieva bean (noun)	Phaseolus lunatus (noun)
small flat green bean similar to lima beans	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