shell bean plant vs shell bean

shell bean plant and shell bean both are nouns.

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

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

shell bean plant and shell bean: a bean plant grown primarily for its edible seed rather than its pod

shell bean plant (noun)	shell bean (noun)
a bean plant grown primarily for its edible seed rather than its pod	unripe beans removed from the pod before cooking
	a bean plant grown primarily for its edible seed rather than its pod