sensitize vs sensitizer

sensitize is not a noun while sensitizer is a noun.

Word	Noun	Adjective	Verb	Adverb
sensitize	No	No	Yes	No
sensitizer	Yes	No	No	No

sensitize (noun)	sensitizer (noun)
	(chemistry) a substance other than a catalyst that facilitates the start of a catalytic reaction

sensitize (verb)	sensitizer (verb)
make sensitive or aware
make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion
make sensitive to a drug or allergen
cause to sense; make sensitive