accusative case vs oblique

accusative case and oblique both are nouns.

Word	Noun	Adjective	Verb	Adverb
accusative case	Yes	No	No	No
oblique	Yes	Yes	No	No

As nouns, oblique is a hypernym of accusative case; that is, oblique is a word with a broader meaning than accusative case:

Other hypernyms of accusative case include oblique case.

accusative case (noun)	oblique (noun)
the case of nouns serving as the direct object of a verb	a diagonally arranged abdominal muscle on either side of the torso
	any grammatical case other than the nominative

accusative case (adjective)	oblique (adjective)
	slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled
	indirect in departing from the accepted or proper way; misleading