Formal complaint
Regret and formal complaint are semantically related. In some cases you can use "Regret" instead a noun phrase "Formal complaint".
Regret
Regret noun - A feeling of responsibility for wrongdoing.
Formal complaint and regret are semantically related. Sometimes you can use "Formal complaint" instead a noun "Regret".
Cite this Source
Regret and Formal complaint. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/formal_complaint/regret
Formal complaint & Regret. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/formal_complaint/regret>.
Regret or Formal complaint. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/formal_complaint/regret.
Google Ngram Viewer shows how "formal complaint" and "regret" have occurred on timeline