woodenness vs stiffness

woodenness and stiffness both are nouns.

Word	Noun	Adjective	Verb	Adverb
woodenness	Yes	No	No	No
stiffness	Yes	No	No	No

As nouns, stiffness is a hypernym of woodenness; that is, stiffness is a word with a broader meaning than woodenness:

woodenness: the quality of being wooden and awkward
stiffness: the inelegance of someone stiff and unrelaxed (as by embarrassment)

Other hypernyms of woodenness include awkwardness, clumsiness, gracelessness.

woodenness (noun)	stiffness (noun)
the quality of being wooden and awkward	the physical property of being inflexible and hard to bend
	the property of moving with pain or difficulty
	the inelegance of someone stiff and unrelaxed (as by embarrassment)
	excessive sternness
	firm resoluteness in purpose or opinion or action