smashing vs colloquialism

smashing and colloquialism both are nouns.

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

smashing (noun)	colloquialism (noun)
the act of breaking something into small pieces	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

smashing (adjective)	colloquialism (adjective)
excellent