| fit | |
| flush | |
| fresh | |
| gold | |
| good | |
| grating | |
| grim | |
| gritty | |
| grueling | |
| gruff(adjective, sound) | |
| hardened | |
| impenetrable(adjective, dense) | |
| inclement | |
| intense(dull, weak, moderate) | |
| intolerant(adjective, heavy) | |
| iron(noun, adjective, hard, tough, inflexible) | |
| laborious | |
| onerous | |
| pitiless | |
| resolute |
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| APA | Smart Define. (2016). soft thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/soft/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "soft thesaurus" https://smartdefine.org/soft/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, soft thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/soft/thesaurus/antonyms>. |
| MLA | Smart Define. "soft thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/soft/thesaurus/antonyms> |