Insubstantial and Nonexistent

Insubstantial

Insubstantial adjective - Being of a material lacking in sturdiness or substance.

Nonexistent and insubstantial are semantically related In some cases you can use "Nonexistent" instead an adjective "Insubstantial".

Nonexistent

Nonexistent adjective - Not present or in evidence.

Insubstantial and nonexistent are semantically related in imaginary topic. You can use "Insubstantial" instead an adjective "Nonexistent", if it concerns topics such as fictional.
Cite this Source
Nonexistent and Insubstantial. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/insubstantial/nonexistent
Insubstantial & Nonexistent. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/insubstantial/nonexistent>.
Nonexistent or Insubstantial. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/insubstantial/nonexistent.
Google Ngram Viewer shows how "insubstantial" and "nonexistent" have occurred on timeline