painful vs torturing

painful is not a noun while torturing is a noun.

Word	Noun	Adjective	Verb	Adverb
painful	No	Yes	No	No
torturing	Yes	Yes	No	No

painful (noun)	torturing (noun)
	the deliberate, systematic, or wanton infliction of physical or mental suffering by one or more persons in an attempt to force another person to yield information or to make a confession or for any other reason

painful (adjective)	torturing (adjective)
causing physical or psychological pain	extremely painful
exceptionally bad or displeasing
causing physical discomfort
causing misery or pain or distress