immortalise vs alter

immortalise and alter both are verbs.

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

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

Other hypernyms of immortalise include change, modify.

immortalise (verb)	alter (verb)
make famous forever	remove the ovaries of
be or provide a memorial to a person or an event	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