oblique vs obliqueness

oblique and obliqueness both are nouns.

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

oblique (noun)	obliqueness (noun)
a diagonally arranged abdominal muscle on either side of the torso	the property of being neither parallel nor perpendicular, but at a slanting angle
any grammatical case other than the nominative	the quality of being oblique and rambling indirectly

oblique (adjective)	obliqueness (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