gumshoe vs colloquialism

gumshoe and colloquialism both are nouns.

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

gumshoe (noun)	colloquialism (noun)
a waterproof overshoe that protects shoes from water or snow	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
someone who is a detective