Doubtful
Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.
Off deep end and doubtful are semantically related. In some cases you can use "Off deep end" instead an adjective "Doubtful".
Off deep end
Doubtful and off deep end are semantically related. Sometimes you can use "Doubtful" instead an adjective phrase "Off deep end".
Mutual synonyms
Cite this Source
Off deep end and Doubtful. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/doubtful/off_deep_end
Doubtful & Off deep end. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/doubtful/off_deep_end>.
Off deep end or Doubtful. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/doubtful/off_deep_end.