irregardless vs colloquialism

irregardless is not a noun while colloquialism is a noun.

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

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

irregardless (adverb)	colloquialism (adverb)
regardless; a combination of irrespective and regardless sometimes used humorously