uneasy vs uneasiness

uneasy is not a noun while uneasiness is a noun.

Word	Noun	Adjective	Verb	Adverb
uneasy	No	Yes	No	No
uneasiness	Yes	No	No	No

uneasy (noun)	uneasiness (noun)
	inability to rest or relax or be still
	the trait of seeming ill at ease
	embarrassment deriving from the feeling that others are critically aware of you
	feelings of anxiety that make you tense and irritable
	physical discomfort (as mild sickness or depression)

uneasy (adjective)	uneasiness (adjective)
lacking a sense of security or affording no ease or reassurance
lacking or not affording physical or mental rest
causing or fraught with or showing anxiety
relating to bodily unease that causes discomfort
socially uncomfortable; unsure and constrained in manner