lima bean vs butter-bean plant

lima bean and butter-bean plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
lima bean	Yes	No	No	No
butter-bean plant	Yes	No	No	No

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

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

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

lima bean (noun)	butter-bean plant (noun)
broad flat beans simmered gently; never eaten raw	bush bean plant cultivated especially in southern United States having small flat edible seeds
bush or tall-growing bean plant having large flat edible seeds
bush bean plant cultivated especially in southern United States having small flat edible seeds