contrariness vs contrary

contrariness and contrary both are nouns.

Word	Noun	Adjective	Verb	Adverb
contrariness	Yes	No	No	No
contrary	Yes	Yes	No	No

contrariness (noun)	contrary (noun)
a fussy and eccentric disposition	exact opposition
deliberate and stubborn unruliness and resistance to guidance or discipline	a relation of direct opposition
	a logical relation such that two propositions are contraries if both cannot be true but both can be false

contrariness (adjective)	contrary (adjective)
	of words or propositions so related that both cannot be true but both may be false
	very opposed in nature or character or purpose
	resistant to guidance or discipline
	in an opposing direction