In error
Regretful and in error are semantically related. in blameworthy topic. In some cases you can use "Regretful" instead an adjective phrase "In error".
Cite this Source
Regretful and In error. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/in_error/regretful
In error & Regretful. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/in_error/regretful>.
Regretful or In error. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/in_error/regretful.
Google Ngram Viewer shows how "in error" and "regretful" have occurred on timeline