devious vs deviousness

devious is not a noun while deviousness is a noun.

Word	Noun	Adjective	Verb	Adverb
devious	No	Yes	No	No
deviousness	Yes	No	No	No

devious (noun)	deviousness (noun)
	the quality of being deceitful and underhanded
	the quality of being oblique and rambling indirectly

devious (adjective)	deviousness (adjective)
deviating from a straight course
indirect in departing from the accepted or proper way; misleading
characterized by insincerity or deceit; evasive