- Definitions|2
- Thesaurus|342
- Abbreviations|0
| forever(adverb, permanent, long-term, lifelong) | |
| heartfelt | |
| impressive(feeling, great, extraordinary, outstanding, notable) | |
| irrevocable(adjective, fixed, stability, permanent, unchangeable) | |
| profound | |
| colorfast(adjective, continue) | |
| deep-dyed | |
| dyed-in-the-wool | |
| impregnable(firm, true, fixed, constant, steadfast) | |
| inerasable(adjective, indestructible) | |
| inextinguishable | |
| rememberable(adjective, great, extraordinary, outstanding, notable) | |
| abiding(permanent, long-term, lifelong) | |
| absorbing | |
| acute | |
| big-league(great, extraordinary, outstanding, notable, unforgettable) | |
| bodacious(great, extraordinary, outstanding, notable, unforgettable) | |
| catchy(great, extraordinary, outstanding, notable, unforgettable) | |
| celebrated(great, extraordinary, outstanding, notable, unforgettable) | |
| continual(permanent, long-term, lifelong) |
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| APA | Smart Define. (2016). indelible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/indelible/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "indelible thesaurus" https://smartdefine.org/indelible/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, indelible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indelible/thesaurus/synonyms>. |
| MLA | Smart Define. "indelible thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/indelible/thesaurus/synonyms> |