versatile vs variable

versatile is not a noun while variable is a noun.

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

versatile (noun)	variable (noun)
	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

versatile (adjective)	variable (adjective)
able to move freely in all directions	liable to or capable of change
competent in many areas and able to turn with ease from one thing to another	(used of a device) designed so that a property (as e.g. light) can be varied
changeable or inconstant	marked by diversity or difference
having great diversity or variety