variable vs shifting

variable and shifting both are nouns.

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

variable (noun)	shifting (noun)
a quantity that can assume any of a set of values	the act of moving from one place to another
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

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