devalue vs alter

devalue and alter both are verbs.

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

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

Other hypernyms of devalue include change, modify.

devalue (verb)	alter (verb)
lower the value or quality of	remove the ovaries of
lose in value	become different in some particular way, without permanently losing one's or its former characteristics or essence
remove the value from; deprive of its value	cause to change; make different; cause a transformation
	insert words into texts, often falsifying it thereby
	make an alteration to