Insubstantial and Underweight

Insubstantial

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

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

Underweight

Underweight adjective - Having little weight.
Usage example: the long illness left him frail and underweight

Insubstantial and underweight are semantically related. Sometimes you can use "Insubstantial" instead an adjective "Underweight".
Cite this Source
Underweight and Insubstantial. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/insubstantial/underweight
Insubstantial & Underweight. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/insubstantial/underweight>.
Underweight or Insubstantial. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/insubstantial/underweight.
Google Ngram Viewer shows how "insubstantial" and "underweight" have occurred on timeline