untie vs alter

untie and alter both are verbs.

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

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

Other hypernyms of untie include change, modify.

untie (verb)	alter (verb)
undo the ties of	remove the ovaries of
cause to become loose	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