uncomfortable vs comfortableness

uncomfortable is not a noun while comfortableness is a noun.

Word	Noun	Adjective	Verb	Adverb
uncomfortable	No	Yes	No	No
comfortableness	Yes	No	No	No

uncomfortable (noun)	comfortableness (noun)
	a feeling of being at ease in a relationship
	a state of being relaxed and feeling no pain

uncomfortable (adjective)	comfortableness (adjective)
providing or experiencing physical discomfort
conducive to or feeling mental discomfort