discolor vs alter

discolor and alter both are verbs.

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

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

Other hypernyms of discolor include change, modify.

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