Forthright
Forthright adjective - Free in expressing one's true feelings and opinions.
Usage example: she sometimes was a little too forthright for her own good and ended up saying things that inadvertently offended people
Sincere is a synonym for forthright in frank topic. In some cases you can use "Sincere" instead an adjective "Forthright", when it comes to topics like genuine, honest, straightforward.
Sincere
Sincere adjective - Genuine in feeling.
Forthright is a synonym for sincere in honest topic. You can use "Forthright" instead an adjective "Sincere", if it concerns topics such as straightforward.
Mutual synonyms
Cite this Source
Sincere and Forthright. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/forthright/sincere
Forthright & Sincere. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/forthright/sincere>.
Sincere or Forthright. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/forthright/sincere.
Google Ngram Viewer shows how "forthright" and "sincere" have occurred on timeline