wilfulness vs wildness

wilfulness and wildness both are nouns.

Word	Noun	Adjective	Verb	Adverb
wilfulness	Yes	No	No	No
wildness	Yes	No	No	No

As nouns, wildness is a hyponym of wilfulness; that is, wildness is a word with a more specific, narrower meaning than wilfulness:

Other hyponyms of wilfulness include contrariness, perverseness, perversity.

wilfulness (noun)	wildness (noun)
the trait of being prone to disobedience and lack of discipline	an intractably barbarous or uncultivated state of nature
	an unruly disposition to do as one pleases
	the property of being wild or turbulent
	a feeling of extreme emotional intensity