Doubtful
Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.
Flustered and doubtful are semantically related in perplexed topic. In some cases you can use "Flustered" instead an adjective "Doubtful", when it comes to topics like not believing.
Cite this Source
Flustered and Doubtful. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/doubtful/flustered
Doubtful & Flustered. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/doubtful/flustered>.
Flustered or Doubtful. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/doubtful/flustered.
Google Ngram Viewer shows how "doubtful" and "flustered" have occurred on timeline