Doubtful and Unestablished

Doubtful

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

Unestablished and doubtful are semantically related. in controvertible topic. In some cases you can use "Unestablished" instead an adjective "Doubtful". rare substitute

Unestablished

Unestablished adjective - Not established.

Doubtful and unestablished are semantically related. Sometimes you can replace term "Doubtful" with "Unestablished", this adjectives are similar.
Cite this Source
Unestablished and Doubtful. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/doubtful/unestablished
Doubtful & Unestablished. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/doubtful/unestablished>.
Unestablished or Doubtful. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/doubtful/unestablished.
Google Ngram Viewer shows how "doubtful" and "unestablished" have occurred on timeline