| survival | |
| natural selection(noun, theory) | |
| evolutionary theory | |
| selection | |
| adaptation(noun, theory) | |
| evolution(noun, theory) | |
| natural law(noun, theory) | |
| social Darwinism(noun, theory, evolution) | |
| battle of life(expression, idiom, treadmill) | |
| daily grind(expression, treadmill) | |
| vicious circle(expression, treadmill) | |
| rat race(noun, expression, competition, treadmill) | |
| Darwinianism(noun, theory) | |
| Darwinism(noun, theory) | |
| Neo-Darwinism(noun, theory) | |
| evolutionism(noun, theory) | |
| hamster cage(expression, treadmill) | |
| law of the jungle(noun, theory) | |
| organic evolution(noun, theory) | |
| phylogeny(noun, theory) |
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| APA | Smart Define. (2011). survival of the fittest thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/survival_of_the_fittest/thesaurus/synonyms |
| Chicago | Smart Define. 2011. "survival of the fittest thesaurus" https://smartdefine.org/survival_of_the_fittest/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2011, survival of the fittest thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/survival_of_the_fittest/thesaurus/synonyms>. |
| MLA | Smart Define. "survival of the fittest thesaurus" 24 May 2011. Web. 24 September 2026. <https://smartdefine.org/survival_of_the_fittest/thesaurus/synonyms> |