sensitivity vs sensitiveness

sensitivity and sensitiveness both are nouns.

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

As nouns, sensitivity and sensitiveness are synonyms defined as:

sensitivity and sensitiveness: the ability to respond to physical stimuli or to register small physical amounts or differences

As nouns, sensitivity and sensitiveness are synonyms defined as:

sensitivity and sensitiveness: the ability to respond to affective changes in your interpersonal environment

As nouns, sensitivity and sensitiveness are synonyms defined as:

sensitivity and sensitiveness: (physiology) responsiveness to external stimuli; the faculty of sensation

Other synonyms of sensitivity include sensibility.

As nouns, sensitivity and sensitiveness are synonyms defined as:

sensitivity and sensitiveness: sensitivity to emotional feelings (of self and others)

sensitivity (noun)	sensitiveness (noun)
the ability to respond to physical stimuli or to register small physical amounts or differences	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	the ability to respond to affective changes in your interpersonal environment
(physiology) responsiveness to external stimuli; the faculty of sensation	(physiology) responsiveness to external stimuli; the faculty of sensation
sensitivity to emotional feelings (of self and others)	sensitivity to emotional feelings (of self and others)
susceptibility to a pathogen