uncomfortableness vs discomfort

uncomfortableness and discomfort both are nouns.

Word	Noun	Adjective	Verb	Adverb
uncomfortableness	Yes	No	No	No
discomfort	Yes	No	No	No

As nouns, uncomfortableness and discomfort are synonyms defined as:

uncomfortableness and discomfort: the state of being tense and feeling pain

uncomfortableness (noun)	discomfort (noun)
embarrassment deriving from the feeling that others are critically aware of you	an uncomfortable feeling of mental painfulness or distress
the state of being tense and feeling pain	the state of being tense and feeling pain