collegial vs colleague

collegial is not a noun while colleague is a noun.

Word	Noun	Adjective	Verb	Adverb
collegial	No	Yes	No	No
colleague	Yes	No	No	No

collegial (noun)	colleague (noun)
	an associate that one works with
	a person who is member of one's class or profession

collegial (adjective)	colleague (adjective)
characterized by or having authority vested equally among colleagues
of or resembling or typical of a college or college students