overshadow vs obscure

overshadow is not an adjective while obscure is an adjective.

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

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

Other hypernyms of overshadow include becloud, befog, cloud, fog, haze over, mist, obnubilate.

overshadow (adjective)	obscure (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

overshadow (verb)	obscure (verb)
cast a shadow upon	make unintelligible or unclear
be greater in significance than	make undecipherable or imperceptible by obscuring or concealing
make appear small by comparison	reduce a vowel to a neutral one, such as a schwa
	make unclear, indistinct, or blurred
	make less visible or unclear