- Definitions|1
- Thesaurus|241
- Abbreviations|0
36 entries under rigid topic. ×
| adamant(hard, resolute, inflexible, strict) | |
| adamantine(hard, resolute, inflexible, strict) | |
| determined(hard, resolute, inflexible, strict) | |
| dyed-in-the-wool(hard, resolute, inflexible, strict) | |
| firm(hard, inflexible, strict, obstinate) | |
| immovable(hard, inflexible, strict, obstinate) | |
| implacable(hard, resolute, inflexible, strict) | |
| indomitable(hard, resolute, inflexible, strict) | |
| inexorable(hard, resolute, inflexible, strict) | |
| obdurate(hard, resolute, inflexible, strict) | |
| relentless(hard, resolute, inflexible, strict) | |
| resolute(hard, inflexible, strict, obstinate) | |
| rigorous(hard, resolute, inflexible, strict) | |
| stiff(adjective, set, hard, resolute) | |
| unrelenting(hard, resolute, inflexible, strict) | |
| unyielding(hard, inflexible, strict, obstinate) |
For more, visit
Hard-and-fast on
Power Thesaurus
| APA | Smart Define. (2015). hard-and-fast thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hard-and-fast/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hard-and-fast thesaurus" https://smartdefine.org/hard-and-fast/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, hard-and-fast thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hard-and-fast/thesaurus/synonyms>. |
| MLA | Smart Define. "hard-and-fast thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/hard-and-fast/thesaurus/synonyms> |