lima bean vs lima bean plant

lima bean and lima bean plant both are nouns.

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

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

lima bean and lima bean plant: bush or tall-growing bean plant having large flat edible seeds

Other synonyms of lima bean include Phaseolus limensis.

lima bean (noun)	lima bean plant (noun)
broad flat beans simmered gently; never eaten raw	bush or tall-growing bean plant having large 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