straightness vs indirect

straightness is a noun but indirect is not a noun.

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

straightness (noun)	indirect (noun)
a sexual attraction to (or sexual relations with) persons of the opposite sex
freedom from crooks or curves or bends or angles
(of hair) lack of a tendency to curl
having honest intentions
trueness of course toward a goal

straightness (adjective)	indirect (adjective)
	not direct in spatial dimension; not leading by a straight line or course to a destination
	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