unsteadiness vs movableness

unsteadiness and movableness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unsteadiness	Yes	No	No	No
movableness	Yes	No	No	No

As nouns, movableness is a hypernym of unsteadiness; that is, movableness is a word with a broader meaning than unsteadiness:

unsteadiness: the quality of not being steady or securely fixed in place
movableness: the quality of being movable; capable of being moved or rearranged

Other hypernyms of unsteadiness include movability.

unsteadiness (noun)	movableness (noun)
the quality of not being steady or securely fixed in place	the quality of being movable; capable of being moved or rearranged
the quality of being unsteady--varying and unpredictable