variables

(noun) something that is likely to vary; something that is subject to variation. Synonyms: variable. Example: "The weather is one variable to be considered."

(noun) a quantity that can assume any of a set of values. Synonyms: variable, variable quantity.

(noun) a star that varies noticeably in brightness. Synonyms: variable star, variable.

(noun) a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity. Synonyms: variable.