banger vs colloquialism

banger and colloquialism both are nouns.

Word	Noun	Adjective	Verb	Adverb
banger	Yes	No	No	No
colloquialism	Yes	No	No	No

banger (noun)	colloquialism (noun)
firework consisting of a small explosive charge and fuse in a heavy paper casing	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
(British informal) pork sausage