Irregular and Mercurial

Irregular

Irregular adjective - Lacking in steadiness or regularity of occurrence.
Usage example: irregular mail delivery to the island

Mercurial and irregular are semantically related In some cases you can use "Mercurial" instead an adjective "Irregular".

Nearby Words: irregularity, irregularly

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

Irregular and mercurial are semantically related in flighty topic. Sometimes you can use "Irregular" instead an adjective "Mercurial".

Nearby Words: mercury, mercuric
Cite this Source
Mercurial and Irregular. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/irregular/mercurial
Irregular & Mercurial. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/irregular/mercurial>.
Mercurial or Irregular. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/irregular/mercurial.
Google Ngram Viewer shows how "irregular" and "mercurial" have occurred on timeline