civet bean vs butter-bean plant

civet bean and butter-bean plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
civet bean	Yes	No	No	No
butter-bean plant	Yes	No	No	No

civet bean (noun)	butter-bean plant (noun)
small flat green bean similar to lima beans	bush bean plant cultivated especially in southern United States having small flat edible seeds