sensitisation vs sensitise

sensitisation is a noun but sensitise is not a noun.

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

sensitisation (noun)	sensitise (noun)
rendering an organism sensitive to a serum by a series of injections
(psychology) the process of becoming highly sensitive to specific events or situations (especially emotional events or situations)
the state of being sensitive (as to an antigen)

sensitisation (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