ionize vs ion

ionize is not a noun while ion is a noun.

Word	Noun	Adjective	Verb	Adverb
ionize	No	No	Yes	No
ion	Yes	No	No	No

ionize (noun)	ion (noun)
	a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons

ionize (verb)	ion (verb)
convert into ions
become converted into ions