obscurity vs oblivion

obscurity and oblivion both are nouns.

Word	Noun	Adjective	Verb	Adverb
obscurity	Yes	No	No	No
oblivion	Yes	No	No	No

As nouns, oblivion is a hyponym of obscurity; that is, oblivion is a word with a more specific, narrower meaning than obscurity:

Other hyponyms of obscurity include anonymity, namelessness, humbleness, lowliness, obscureness, unimportance, nowhere, limbo.

obscurity (noun)	oblivion (noun)
the quality of being unclear or abstruse and hard to understand	total forgetfulness
an obscure and unimportant standing; not well known	the state of being disregarded or forgotten
the state of being indistinct or indefinite for lack of adequate illumination