untune vs alter

untune and alter both are verbs.

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

As verbs, alter is a hypernym of untune; that is, alter is a word with a broader meaning than untune:

Other hypernyms of untune include change, modify.

untune (verb)	alter (verb)
cause to be out of tune	remove the ovaries of
cause to lose one's composure	become different in some particular way, without permanently losing one's or its former characteristics or essence
	cause to change; make different; cause a transformation
	insert words into texts, often falsifying it thereby
	make an alteration to