lima bean vs shell bean plant

lima bean and shell bean plant both are nouns.

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

As nouns, shell bean plant is a hypernym of lima bean; that is, shell bean plant is a word with a broader meaning than lima bean:

lima bean: bush or tall-growing bean plant having large flat edible seeds
shell bean plant: a bean plant grown primarily for its edible seed rather than its pod

Other hypernyms of lima bean include shell bean.

As nouns, shell bean plant is a hypernym of lima bean; that is, shell bean plant is a word with a broader meaning than lima bean:

lima bean: bush bean plant cultivated especially in southern United States having small flat edible seeds
shell bean plant: a bean plant grown primarily for its edible seed rather than its pod

Other hypernyms of lima bean include shell bean.

lima bean (noun)	shell bean plant (noun)
broad flat beans simmered gently; never eaten raw	a bean plant grown primarily for its edible seed rather than its pod
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