colloquialism vs teeny-weeny

colloquialism is a noun but teeny-weeny is not a noun.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
teeny-weeny	No	Yes	No	No

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

colloquialism (adjective)	teeny-weeny (adjective)
	(used informally) little or tiny