oblique vs indirect

oblique is a noun but indirect is not a noun.

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

oblique (noun)	indirect (noun)
a diagonally arranged abdominal muscle on either side of the torso
any grammatical case other than the nominative

oblique (adjective)	indirect (adjective)
slanting or inclined in direction or course or position--neither parallel nor perpendicular nor right-angled	not direct in spatial dimension; not leading by a straight line or course to a destination
indirect in departing from the accepted or proper way; misleading	extended senses; not direct in manner or language or behavior or action
	descended from a common ancestor but through different lines
	having intervening factors or persons or influences
	not as a direct effect or consequence