- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
140 entries under hard topic. ×
| hang-tough(adjective, strong, tough, harsh) | |
| hard-bitten(adjective, tough, harsh, cruel) | |
| hard-boiled(adjective, strong, tough, severe) | |
| hard-line(adjective, strong, tough, severe) | |
| hardened(adjective, tough, harsh, cruel) | |
| hardheaded(adjective, strong, tough, severe) | |
| impenitent(adjective, tough, harsh, cruel) | |
| indomitable(adjective, set, strong, tough) | |
| inhumane(adjective, tough, harsh, cruel) | |
| insensitive(adjective, tough, harsh, cruel) | |
| labored(adjective, tough, rough, difficult) | |
| mortified(adjective, strong, tough, severe) | |
| mulish(adjective, strong, tough, severe) | |
| murder(adjective, tough, severe, rough) | |
| sanguinary(adjective, tough, harsh, cruel) | |
| serious(adjective, strong, tough, severe) | |
| set(adjective, tough, severe, firm) | |
| shameless(adjective, tough, harsh, cruel) | |
| sour(adjective, tough, harsh, cruel) | |
| tiring(adjective, tough, severe, rough) |
For more, visit
Rigorous on
Power Thesaurus
| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |