colloquialism vs blahs

colloquialism and blahs both are nouns.

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

colloquialism (noun)	blahs (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	a general feeling of boredom and dissatisfaction