deviousness vs devious

deviousness is a noun but devious is not a noun.

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

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

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