painfulness vs hurt

painfulness and hurt both are nouns.

Word	Noun	Adjective	Verb	Adverb
painfulness	Yes	No	No	No
hurt	Yes	Yes	Yes	No

As nouns, hurt is a hyponym of painfulness; that is, hurt is a word with a more specific, narrower meaning than painfulness:

painfulness: emotional distress; a fundamental feeling that people try to avoid
hurt: feelings of mental or physical pain

Other hyponyms of painfulness include growing pains, unpleasantness, mental anguish, suffering, distress, suffering.

painfulness (noun)	hurt (noun)
the quality of being painful	the act of damaging something or someone
emotional distress; a fundamental feeling that people try to avoid	a damage or loss
	feelings of mental or physical pain
	psychological suffering
	any physical damage to the body caused by violence or accident or fracture etc.; the condition of an injury

painfulness (adjective)	hurt (adjective)
	damaged; used of inanimate objects or their value
	suffering from physical injury especially that suffered in battle

painfulness (verb)	hurt (verb)
	give trouble or pain to
	be in pain
	cause damage or affect negatively
	hurt the feelings of
	cause emotional anguish or make miserable
	be the source of pain
	feel physical pain