10 entries under immutable topic. ×
| ageless(adjective, change, endless, enduring, lasting) | |
| lasting(adjective, vast, permanent, everlasting, eternal) | |
| perennial(adjective, constant, endless, indefinite, lasting) | |
| abiding(adjective, lasting, permanent, everlasting, eternal) | |
| indestructible(adjective, lasting, permanent, everlasting, eternal) | |
| unfading(vast, lasting, permanent, everlasting, eternal) | |
| forever(adjective, vast, lasting, permanent, everlasting) | |
| indefinite(adjective, lasting, permanent, everlasting, eternal) | |
| perdurable(lasting, permanent, everlasting, eternal, unending) | |
| termless(adjective, vast, lasting, infinite, permanent) |
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| APA | Smart Define. (2016). timeless thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/timeless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "timeless thesaurus" https://smartdefine.org/timeless/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, timeless thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/timeless/thesaurus/synonyms>. |
| MLA | Smart Define. "timeless thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/timeless/thesaurus/synonyms> |