hypersensitivity vs sensitivity

hypersensitivity and sensitivity both are nouns.

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

As nouns, sensitivity is a hypernym of hypersensitivity; that is, sensitivity is a word with a broader meaning than hypersensitivity:

hypersensitivity: extreme sensitivity
sensitivity: (physiology) responsiveness to external stimuli; the faculty of sensation

Other hypernyms of hypersensitivity include sensibility, sensitiveness.

As nouns, sensitivity is a hypernym of hypersensitivity; that is, sensitivity is a word with a broader meaning than hypersensitivity:

Other hypernyms of hypersensitivity include predisposition.

hypersensitivity (noun)	sensitivity (noun)
extreme sensitivity	the ability to respond to physical stimuli or to register small physical amounts or differences
pathological sensitivity	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