Questionable and Undubitable
Opposite meaning words
Questionable
Questionable adjective - Giving good reason for being doubted, questioned, or challenged.
Undubitable is an antonym for questionable.
Undubitable
Cite this Source
Undubitable and Questionable. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/questionable/undubitable
Questionable & Undubitable. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/questionable/undubitable>.
Undubitable or Questionable. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/questionable/undubitable.
Google Ngram Viewer shows how "questionable" and "undubitable" have occurred on timeline