resign vs resignation

resign is not a noun while resignation is a noun.

Word	Noun	Adjective	Verb	Adverb
resign	No	No	Yes	No
resignation	Yes	No	No	No

resign (noun)	resignation (noun)
	the act of giving up (a claim or office or possession etc.)
	a formal document giving notice of your intention to resign
	acceptance of despair

resign (verb)	resignation (verb)
accept as inevitable
part with a possession or right
leave (a job, post, or position) voluntarily
give up or retire from a position