envenom vs alter

envenom and alter both are verbs.

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

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

Other hypernyms of envenom include change, modify.

envenom (verb)	alter (verb)
add poison to	remove the ovaries of
cause to be bitter or resentful	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