sensitising vs sensitivity

sensitising and sensitivity both are nouns.

Word	Noun	Adjective	Verb	Adverb
sensitising	Yes	Yes	No	No
sensitivity	Yes	No	No	No

sensitising (noun)	sensitivity (noun)
rendering an organism sensitive to a serum by a series of injections	the ability to respond to physical stimuli or to register small physical amounts or differences
	the ability to respond to affective changes in your interpersonal environment
	(physiology) responsiveness to external stimuli; the faculty of sensation
	sensitivity to emotional feelings (of self and others)
	susceptibility to a pathogen

sensitising (adjective)	sensitivity (adjective)
making susceptible or sensitive to either physical or emotional stimuli