colloquialism vs thoroughly

colloquialism is a noun but thoroughly is not a noun.

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

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

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