Doubtful and Unchallenged
Opposite meaning words
Doubtful
Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.
Unchallenged is an antonym for doubtful.
Unchallenged
Unchallenged adjective - Generally agreed upon; not subject to dispute.
Nearby Word: unchallengeable
Cite this Source
Unchallenged and Doubtful. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/doubtful/unchallenged
Doubtful & Unchallenged. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/doubtful/unchallenged>.
Unchallenged or Doubtful. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/doubtful/unchallenged.
Google Ngram Viewer shows how "doubtful" and "unchallenged" have occurred on timeline