sensitiser vs sensitise

sensitiser is a noun but sensitise is not a noun.

Word	Noun	Adjective	Verb	Adverb
sensitiser	Yes	No	No	No
sensitise	No	No	Yes	No

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

sensitiser (verb)	sensitise (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