The term "variable" refers to something that is subject to change and may be uncertain or unpredictable in nature. There are several synonyms for this word, including changeable, fluctuating, unstable, inconstant, and mutable. Other synonyms include adjustable, malleable, modifiable, and flexible. In mathematics and statistics, the term "variable" refers to an unknown quantity that can take on different values. Synonyms for this usage of the word include unknown, unidentified, and indeterminate. Understanding the nuances of these synonyms is essential when communicating about subjects that involve variability, such as scientific experimentation or financial forecasting.