dickey vs colloquialism

dickey and colloquialism both are nouns.

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

dickey (noun)	colloquialism (noun)
a man's detachable insert (usually starched) to simulate the front of a shirt	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
a small third seat in the back of an old-fashioned two-seater

dickey (adjective)	colloquialism (adjective)
(British informal) faulty