colloquialism vs flustered

colloquialism is a noun but flustered is not a noun.

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

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

colloquialism (adjective)	flustered (adjective)
	thrown into a state of agitated confusion; (`rattled' is an informal term)