- Definitions|2
- Thesaurus|211
- Abbreviations|0
| unalterable(adjective, inflexible, changeable, flexible) | |
| unchangeable(adjective, certain, limited, definite, fixed) | |
| fixed(adjective, set, hard, regular, rigid) | |
| invariable(adjective, inflexible, flexible, changing) | |
| immutable(adjective, inflexible, flexible) | |
| inflexible(adjective, set, certain, limited, definite) | |
| changeless(adjective, set, certain, limited, definite) | |
| constant | |
| ironclad(adjective, inflexible, flexible) | |
| steadfast(adjective, certain, limited, definite, fixed) | |
| steady(adjective, certain, limited, definite, inflexible) | |
| incommutable | |
| indomitable(adjective, inflexible) | |
| obstinate(adjective, inflexible) | |
| permanent | |
| relentless(adjective, inflexible) | |
| resolute(adjective, inflexible) | |
| rigid(adjective, inflexible, flexible) | |
| set(adjective, certain, limited, definite, constant) | |
| unrelenting(adjective, inflexible) |
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| APA | Smart Define. (2015). inalterable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/inalterable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "inalterable thesaurus" https://smartdefine.org/inalterable/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, inalterable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/inalterable/thesaurus/synonyms>. |
| MLA | Smart Define. "inalterable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/inalterable/thesaurus/synonyms> |