Felonious
Nefarious
Nefarious adjective - Not conforming to a high moral standard; morally unacceptable.
Mutual synonyms
Related pairs
Both words in one sentence
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Also...SNAFU usually means something different than Society of Nefarious and Felonious Undertakings...note It traditionally means "Situation Normal, All Fucked Up" (or "Fouled Up" if you're keeping it PG).
Source: Western Animation / The X's
Cite this Source
Nefarious and Felonious. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/felonious/nefarious
Felonious & Nefarious. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/felonious/nefarious>.
Nefarious or Felonious. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/felonious/nefarious.
Google Ngram Viewer shows how "felonious" and "nefarious" have occurred on timeline