| ruffian | |
| ruthless(adjective, mean, cruel, brutal, pitiless) | |
| sai | |
| savage(noun, adjective, mean, harsh, cruel) | |
| severe(adjective, mean, harsh, cruel, vicious) | |
| spitfire | |
| terrorist | |
| trigger man(noun, expression, murderer, assassin) | |
| winner(noun, bad) | |
| wolf | |
| rapist(noun, person, violation, madness) | |
| competitive(adjective, oppose, informal) | |
| fatal | |
| goon | |
| mugger | |
| soldier(noun, guerrilla, murderer, assassin, slayer) | |
| triggerman(noun, person, help, murderer) | |
| Orcinus orca | |
| antagonistic(adjective, spirited, aggressive, ambitious, competing) | |
| assassination |
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| APA | Smart Define. (2016). killer thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/killer/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "killer thesaurus" https://smartdefine.org/killer/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, killer thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/killer/thesaurus/synonyms>. |
| MLA | Smart Define. "killer thesaurus" 30 March 2016. Web. 22 September 2026. <https://smartdefine.org/killer/thesaurus/synonyms> |