colloquialism vs roughly

colloquialism is a noun but roughly is not a noun.

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

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

colloquialism (adverb)	roughly (adverb)
	(of quantities) imprecise but fairly close to correct
	with rough motion as over a rough surface
	with roughness or violence (`rough' is an informal variant for `roughly')