Unofficial
Unofficial adjective - Not having official authority or sanction.
Without substantiation and unofficial are semantically related. In some cases you can use "Without substantiation" instead an adjective "Unofficial".
Nearby Word: unofficially
Without substantiation
Unofficial and without substantiation are semantically related. Sometimes you can use "Unofficial" instead an adjective phrase "Without substantiation".
Mutual synonyms
Cite this Source
Without substantiation and Unofficial. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/unofficial/without_substantiation
Unofficial & Without substantiation. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/unofficial/without_substantiation>.
Without substantiation or Unofficial. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/unofficial/without_substantiation.
Google Ngram Viewer shows how "unofficial" and "without substantiation" have occurred on timeline