diagonal vs oblique

diagonal and oblique both are nouns.

Word	Noun	Adjective	Verb	Adverb
diagonal	Yes	Yes	No	No
oblique	Yes	Yes	No	No

diagonal (noun)	oblique (noun)
a punctuation mark (/) used to separate related items of information	a diagonally arranged abdominal muscle on either side of the torso
an oblique line of squares of the same color on a checkerboard	any grammatical case other than the nominative
(mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry
a line or cut across a fabric that is not at right angles to a side of the fabric
(geometry) a straight line connecting any two vertices of a polygon that are not adjacent

diagonal (adjective)	oblique (adjective)
having an oblique or slanted direction	slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled
connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face	indirect in departing from the accepted or proper way; misleading