bean plant vs pole bean

bean plant and pole bean both are nouns.

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

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

bean plant: any of various leguminous plants grown for their edible seeds and pods
pole bean: a climbing bean plant that will climb a wall or tree or trellis

Other hyponyms of bean plant include bush bean, shell bean, shell bean plant.

bean plant (noun)	pole bean (noun)
any of various leguminous plants grown for their edible seeds and pods	a climbing bean plant that will climb a wall or tree or trellis