pep talk vs colloquialism

pep talk and colloquialism both are nouns.

Word	Noun	Adjective	Verb	Adverb
pep talk	Yes	No	No	No
colloquialism	Yes	No	No	No

pep talk (noun)	colloquialism (noun)
a speech of exhortation attempting to instill enthusiasm and determination in a team or staff	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech