silly vs colloquialism

silly and colloquialism both are nouns.

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

silly (noun)	colloquialism (noun)
a word used for misbehaving children	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

silly (adjective)	colloquialism (adjective)
dazed from or as if from repeated blows
ludicrous, foolish
lacking seriousness; given to frivolity
inspiring scornful pity