untune vs pain

untune is not a noun while pain is a noun.

Word	Noun	Adjective	Verb	Adverb
untune	No	No	Yes	No
pain	Yes	No	Yes	No

As verbs, pain is a hyponym of untune; that is, pain is a word with a more specific, narrower meaning than untune:

untune (noun)	pain (noun)
	a somatic sensation of acute discomfort
	something or someone that causes trouble; a source of unhappiness
	emotional distress; a fundamental feeling that people try to avoid
	a symptom of some physical hurt or disorder

untune (verb)	pain (verb)
cause to be out of tune	cause bodily suffering to and make sick or indisposed
cause to lose one's composure	cause emotional anguish or make miserable