obliqueness vs oblique

obliqueness and oblique both are nouns.

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

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

obliqueness (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