cohere vs alter

cohere and alter both are verbs.

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

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

Other hypernyms of cohere include change, modify.

cohere (verb)	alter (verb)
come or be in close contact with; stick or hold together and resist separation	remove the ovaries of
have internal elements or parts logically connected so that aesthetic consistency results	become different in some particular way, without permanently losing one's or its former characteristics or essence
cause to form a united, orderly, and aesthetically consistent whole	cause to change; make different; cause a transformation
	insert words into texts, often falsifying it thereby
	make an alteration to