butter bean vs civet bean

butter bean and civet bean both are nouns.

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

As nouns, butter bean and civet bean are synonyms defined as:

Other synonyms of butter bean include butterbean, sieva bean.

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