- Definitions|2
- Thesaurus|985
- Abbreviations|0
48 entries under permanent topic. ×
| irreversible(adjective, fixed, even, rigid, inflexible) | |
| perennial(adjective, stable, constant, stability, enduring) | |
| unending(adjective, persistent, constant, continuous, endless) | |
| unmodifiable(adjective, set, secure, steady, fixed) | |
| set(adjective, calm, strong, secure, firm) | |
| timeless(adjective, lasting, everlasting, unending) | |
| uncompromising(adjective, hard, secure, rough, firm) | |
| ageless(adjective, fixed, lasting, unchanging) | |
| ceaseless(adjective, persistent, constant, continuous, endless) | |
| continuous(adjective, persistent, constant, endless, indefinite) | |
| intransigent(steady, fixed, impassive, inflexible, stubborn) | |
| perdurable(calm, strong, solid, substantial, constant) | |
| relentless(adjective, set, strong, hard, firm) | |
| unfading(stable, fixed, constant, enduring, lasting) | |
| unremitting(adjective, persistent, constant, continuous, endless) | |
| continued(lasting, everlasting, unending, undying) | |
| dateless(lasting, everlasting, unending, undying) | |
| fated(adjective, fixed, even, rigid, inflexible) | |
| forever(stable, constant, enduring, lasting) | |
| immemorial(lasting, everlasting, unending, undying) |
For more, visit
Immutable on
Power Thesaurus
| APA | Smart Define. (2015). immutable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/immutable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "immutable thesaurus" https://smartdefine.org/immutable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, immutable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/immutable/thesaurus/synonyms>. |
| MLA | Smart Define. "immutable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/immutable/thesaurus/synonyms> |