sieva bean vs shell bean

sieva bean and shell bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
sieva bean	Yes	No	No	No
shell bean	Yes	No	No	No

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

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

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

Other hypernyms of sieva bean include shell bean plant.

sieva bean (noun)	shell bean (noun)
small flat green bean similar to lima beans	unripe beans removed from the pod before cooking
bush bean plant cultivated especially in southern United States having small flat edible seeds	a bean plant grown primarily for its edible seed rather than its pod