Irritant
Irritant noun - Something that is a source of irritation.
Usage example: the whining child was a constant irritant to his long-suffering parents
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Synonyms for Irritant
Pest is a synonym for irritant in irritation topic. In some cases you can use "Pest" instead a noun "Irritant", when it comes to topics like nuisance, annoyance. popular alternative
Pest
Pest noun - Something that is a source of irritation.
Usage example: a never-ending construction project that continues to be a pest for motorists
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Pest and Irritant. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/irritant/pest
Irritant & Pest. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/irritant/pest>.
Pest or Irritant. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/irritant/pest.
Google Ngram Viewer shows how "irritant" and "pest" have occurred on timeline