thoroughly vs colloquialism

thoroughly is not a noun while colloquialism is a noun.

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

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

thoroughly (adverb)	colloquialism (adverb)
in an exhaustive manner
completely and absolutely (`good' is sometimes used informally for `thoroughly')