- Definitions|1
- Thesaurus|337
- Abbreviations|0
| inextirpable | |
| ingrained(adjective, hardened, confirmed, chronic) | |
| interminable(long, continuous, everlasting, uninterrupted, drawn-out) | |
| lengthened(long, drawn-out) | |
| lengthy(long, drawn-out) | |
| long-established(familiar, established) | |
| long-winded(long, drawn-out) | |
| longish(long, drawn-out) | |
| longstanding(permanent, recurrent, perpetual, long-term, lifelong) | |
| longtime | |
| non-breakable | |
| non-perishable | |
| obstinate(adjective, hardened, confirmed, chronic) | |
| overlong(long, drawn-out) | |
| padded(long, drawn-out) | |
| practiced(familiar, established, long-established) | |
| prolix(long, drawn-out) | |
| prolonged(adjective, long, drawn-out) | |
| protracted(adjective, long, drawn-out) | |
| recurrent(adjective, continuous, everlasting, uninterrupted, perpetual) |
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| APA | Smart Define. (2015). long-lasting thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/long-lasting/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "long-lasting thesaurus" https://smartdefine.org/long-lasting/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, long-lasting thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/long-lasting/thesaurus/synonyms>. |
| MLA | Smart Define. "long-lasting thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/long-lasting/thesaurus/synonyms> |