stiffness vs woodenness

stiffness and woodenness both are nouns.

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

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

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

Other hyponyms of stiffness include gaucherie, rusticity.

stiffness (noun)	woodenness (noun)
the physical property of being inflexible and hard to bend	the quality of being wooden and awkward
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