Irregular
Irregular adjective - Lacking in steadiness or regularity of occurrence.
Usage example: irregular mail delivery to the island
Sudden and irregular are semantically related. In some cases you can use "Sudden" instead an adjective "Irregular".
Nearby Words: irregularity, irregularly
Sudden
Sudden adjective - Not expected.
Irregular and sudden are semantically related. Sometimes you can use "Irregular" instead an adjective "Sudden".
Nearby Words: suddenly, suddenness
Mutual synonyms
Cite this Source
Sudden and Irregular. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/irregular/sudden
Irregular & Sudden. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/irregular/sudden>.
Sudden or Irregular. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/irregular/sudden.
Google Ngram Viewer shows how "irregular" and "sudden" have occurred on timeline