obscure vs alter

obscure is an adjective but alter is not an adjective.

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

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

Other hypernyms of obscure include change, modify.

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

Other hypernyms of obscure include change, modify.

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

Other hypernyms of obscure include change, modify.

obscure (adjective)	alter (adjective)
difficult to find
marked by difficulty of style or expression
not drawing attention
not famous or acclaimed
not clearly expressed or understood
remote and separate physically or socially

obscure (verb)	alter (verb)
make unintelligible or unclear	remove the ovaries of
make undecipherable or imperceptible by obscuring or concealing	become different in some particular way, without permanently losing one's or its former characteristics or essence
reduce a vowel to a neutral one, such as a schwa	cause to change; make different; cause a transformation
make unclear, indistinct, or blurred	insert words into texts, often falsifying it thereby
make less visible or unclear	make an alteration to