variable vs versatile

variable is a noun but versatile is not a noun.

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

variable (noun)	versatile (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

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