field bean vs horsebean

field bean and horsebean both are nouns.

Word	Noun	Adjective	Verb	Adverb
field bean	Yes	No	No	No
horsebean	Yes	No	No	No

field bean (noun)	horsebean (noun)
Old World upright plant grown especially for its large flat edible seeds but also as fodder	large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America but naturalized in southern United States
	seed of the broad-bean plant