238 entries under severe topic. ×
| effortful(tough, painful, problematic, trying) | |
| forbidding(adjective, strong, hard, tough) | |
| frowning(adjective, strong, hard, tough) | |
| fundamental | |
| galling(tough, painful, problematic, trying) | |
| gargantuan(tough, painful, problematic, trying) | |
| glaring(adjective, hard, sharp, flat) | |
| grating(adjective, hard, sharp, flat) | |
| guttural(adjective, hard, sharp, flat) | |
| hard-won(tough, painful, problematic, trying) | |
| heavy(adjective, strong, hard, tough) | |
| herculean(tough, painful, problematic, trying) | |
| hoarse(adjective, hard, sharp, flat) | |
| immense(tough, painful, problematic, trying) | |
| imperial | |
| incompatible(adjective, hard, sharp, flat) | |
| intricate(adjective, tough, painful, demanding) | |
| iron-fisted(adjective, tough, firm, harsh) | |
| irritating(tough, painful, problematic, trying) | |
| jagged(adjective, hard, sharp, flat) |
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| APA | Smart Define. (2015). rigid thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, rigid thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>. |
| MLA | Smart Define. "rigid thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms> |