shifting vs variable

shifting and variable both are nouns.

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

shifting (noun)	variable (noun)
the act of moving from one place to another	a quantity that can assume any of a set of values
	a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
	something that is likely to vary; something that is subject to variation
	a star that varies noticeably in brightness

shifting (adjective)	variable (adjective)
(of soil) unstable	liable to or capable of change
changing position or direction	(used of a device) designed so that a property (as e.g. light) can be varied
continuously varying	marked by diversity or difference