Doubtful and Undocumented

Doubtful

Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.

Undocumented and doubtful are semantically related. In some cases you can use "Undocumented" instead an adjective "Doubtful".

Undocumented

Undocumented adjective - Lacking necessary documents (as for e.g. permission to live or work in a country).
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Synonyms for Undocumented

Doubtful and undocumented are semantically related. Sometimes you can use "Doubtful" instead an adjective "Undocumented".
Cite this Source
Undocumented and Doubtful. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/doubtful/undocumented
Doubtful & Undocumented. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/doubtful/undocumented>.
Undocumented or Doubtful. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/doubtful/undocumented.
Google Ngram Viewer shows how "doubtful" and "undocumented" have occurred on timeline