Insoluble and Tough

Insoluble

Insoluble adjective - Incapable of being solved or accomplished.

Tough and insoluble are semantically related. In some cases you can use "Tough" instead an adjective "Insoluble".

Nearby Word: insolubility

Tough

Tough adjective - Requiring considerable physical or mental effort.
Usage example: even if you study for it, it's still a tough exam

Insoluble and tough are semantically related. Sometimes you can use "Insoluble" instead an adjective "Tough".

Nearby Words: toughness, toughen, toughening, tougher, toughed
Cite this Source
Tough and Insoluble. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/insoluble/tough
Insoluble & Tough. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/insoluble/tough>.
Tough or Insoluble. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/insoluble/tough.
Google Ngram Viewer shows how "insoluble" and "tough" have occurred on timeline