Nefarious and Unprincipled

Nefarious

Nefarious adjective - Not conforming to a high moral standard; morally unacceptable.
Usage example: the chaste heroines and nefarious villains of old-time melodramas

Unprincipled and nefarious are semantically related. In some cases you can use "Unprincipled" instead an adjective "Nefarious".

Unprincipled

Unprincipled adjective - Not guided by or showing a concern for what is right.

Nefarious and unprincipled are semantically related. Sometimes you can use "Nefarious" instead an adjective "Unprincipled".
Cite this Source
Unprincipled and Nefarious. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/nefarious/unprincipled
Nefarious & Unprincipled. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/nefarious/unprincipled>.
Unprincipled or Nefarious. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/nefarious/unprincipled.
Google Ngram Viewer shows how "nefarious" and "unprincipled" have occurred on timeline