Extermination
Extermination noun - The state or fact of being rendered nonexistent, physically unsound, or useless.
Killing off and extermination are semantically related. In some cases you can use "Killing off" instead a noun "Extermination".
Killing off
Extermination and killing off are semantically related. You can use "Extermination" instead a noun phrase "Killing off".
Mutual synonyms
Both terms in one sentence
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Guilt-Free Extermination War: Absolutely no one feels bad about killing off the Radam's hordes; the Tekkamen... not so much.
Source: Anime / Tekkaman Blade
Cite this Source
Killing off and Extermination. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/extermination/killing_off
Extermination & Killing off. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/extermination/killing_off>.
Killing off or Extermination. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/extermination/killing_off.
Google Ngram Viewer shows how "extermination" and "killing off" have occurred on timeline