Gratuitous and Unsubstantiated

Gratuitous

Gratuitous adjective - Not costing or charging anything.

Unsubstantiated and gratuitous are semantically related. In some cases you can use "Unsubstantiated" instead an adjective "Gratuitous".

Nearby Words: gratuity, gratuitously

Unsubstantiated

Unsubstantiated adjective - Having no basis in reason or fact.
Usage example: an unsubstantiated claim that was thrown out of court

Gratuitous and unsubstantiated are semantically related. Sometimes you can use "Gratuitous" instead an adjective "Unsubstantiated".

Nearby Word: unsubstantially
Cite this Source
Unsubstantiated and Gratuitous. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/gratuitous/unsubstantiated
Gratuitous & Unsubstantiated. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/gratuitous/unsubstantiated>.
Unsubstantiated or Gratuitous. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/gratuitous/unsubstantiated.
Google Ngram Viewer shows how "gratuitous" and "unsubstantiated" have occurred on timeline