uneasiness vs uneasy

uneasiness is a noun but uneasy is not a noun.

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

uneasiness (noun)	uneasy (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)

uneasiness (adjective)	uneasy (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