shell bean plant vs bean plant

shell bean plant and bean plant both are nouns.

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

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

shell bean plant: a bean plant grown primarily for its edible seed rather than its pod
bean plant: any of various leguminous plants grown for their edible seeds and pods

Other hypernyms of shell bean plant include bean.

shell bean plant (noun)	bean plant (noun)
a bean plant grown primarily for its edible seed rather than its pod	any of various leguminous plants grown for their edible seeds and pods