unsteady vs shifting

unsteady is not a noun while shifting is a noun.

Word	Noun	Adjective	Verb	Adverb
unsteady	No	Yes	No	No
shifting	Yes	Yes	No	No

unsteady (noun)	shifting (noun)
	the act of moving from one place to another

unsteady (adjective)	shifting (adjective)
subject to change or variation	(of soil) unstable
not firmly or solidly positioned	changing position or direction
	continuously varying