common bean vs wax bean

common bean and wax bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
common bean	Yes	No	No	No
wax bean	Yes	No	No	No

As nouns, wax bean is a hyponym of common bean; that is, wax bean is a word with a more specific, narrower meaning than common bean:

common bean: the common annual twining or bushy bean plant grown for its edible seeds or pods
wax bean: a common bean plant grown for its edible golden pod

Other hyponyms of common bean include frijol, frijole, kidney bean, green bean.

common bean (noun)	wax bean (noun)
any of numerous beans eaten either fresh or dried	snap beans with yellow pods
the common annual twining or bushy bean plant grown for its edible seeds or pods	a common bean plant grown for its edible golden pod