rude vs civility

rude is not a noun while civility is a noun.

Word	Noun	Adjective	Verb	Adverb
rude	No	Yes	No	No
civility	Yes	No	No	No

rude (noun)	civility (noun)
	the act of showing regard for others
	formal or perfunctory politeness

rude (adjective)	civility (adjective)
lacking civility or good manners
belonging to an early stage of technical development; characterized by simplicity and (often) crudeness
socially incorrect in behavior
(used especially of commodities) being unprocessed or manufactured using only simple or minimal processes
(of persons) lacking in refinement or grace