normalise vs alter

normalise and alter both are verbs.

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

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

Other hypernyms of normalise include change, modify.

normalise (verb)	alter (verb)
make normal or cause to conform to a norm or standard	remove the ovaries of
become normal or return to its normal state	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