colloquialism vs alright

colloquialism is a noun but alright is not a noun.

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

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

colloquialism (adjective)	alright (adjective)
	nonstandard usage

colloquialism (adverb)	alright (adverb)
	an expression of agreement normally occurring at the beginning of a sentence
	without doubt (used to reinforce an assertion)
	in a satisfactory or adequate manner