colloquialism vs chancy

colloquialism is a noun but chancy is not a noun.

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

colloquialism (noun)	chancy (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

colloquialism (adjective)	chancy (adjective)
	of uncertain outcome; especially fraught with risk
	subject to accident or chance or change