redo vs alter

redo and alter both are verbs.

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

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

Other hypernyms of redo include change, modify.

redo (verb)	alter (verb)
do over, as of (part of) a house	remove the ovaries of
make new	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