Impeccable
Impeccable adjective - Being entirely without fault or flaw.
Sincere and impeccable are semantically related. In some cases you can use "Sincere" instead an adjective "Impeccable".
Nearby Words: impeccability, impeccably
Sincere
Sincere adjective - Genuine in feeling.
Impeccable and sincere are semantically related. Sometimes you can use "Impeccable" instead an adjective "Sincere".
Cite this Source
Sincere and Impeccable. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/impeccable/sincere
Impeccable & Sincere. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/impeccable/sincere>.
Sincere or Impeccable. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/impeccable/sincere.
Google Ngram Viewer shows how "impeccable" and "sincere" have occurred on timeline