headhunter vs colloquialism

headhunter and colloquialism both are nouns.

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

headhunter (noun)	colloquialism (noun)
a savage who cuts off and preserves the heads of enemies as trophies	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
a recruiter of personnel (especially for corporations)