Mercurial
Mercurial adjective - Likely to change frequently, suddenly, or unexpectedly.
Usage example: the boss's mood is so mercurial that we never know how he's going to react to anything
Unpredictable is a synonym for mercurial in change topic. In some cases you can use "Unpredictable" instead an adjective "Mercurial", when it comes to topics like capricious, volatile, flighty. popular alternative
Unpredictable
Unpredictable adjective - Likely to change frequently, suddenly, or unexpectedly.
Usage example: unpredictable spring weather that makes it really hard to know what to wear
Mercurial is a synonym for unpredictable in change topic. You can use "Mercurial" instead the word "Unpredictable" as an adjective or a noun, if it concerns topics such as erratic. popular alternative
Nearby Word: unpredictability
Mutual synonyms
Related pairs
- impulsive and mercurial
- impulsive and unpredictable
- irregular and mercurial
- irregular and unpredictable
- capricious and mercurial
- capricious and unpredictable
- whimsical and mercurial
- whimsical and unpredictable
- inconsistent and mercurial
- inconsistent and unpredictable
- unstable and mercurial
- unstable and unpredictable
- volatile and mercurial
- volatile and unpredictable
Both words in one sentence
- The PCs' employer is eccentric, mercurial, volatile, unpredictable and sometimes ruthlessly malicious toward them.
Source: Shout Out / Tabletop Games -
With powers that draw on mercurial shapeshifting and bestial power, the Stewards are the most adaptable and unpredictable of the Exalted.
Source: Tabletop Game / Exalted
Cite this Source
Unpredictable and Mercurial. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/mercurial/unpredictable
Mercurial & Unpredictable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/mercurial/unpredictable>.
Unpredictable or Mercurial. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/mercurial/unpredictable.
Google Ngram Viewer shows how "mercurial" and "unpredictable" have occurred on timeline