| classy(adjective, style, taste, fashion) | |
| all-night | |
| durable | |
| lengthy | |
| forever(adverb, ever, perpetually, permanently, enduringly) | |
| gargantuan(noun, verb, adjective, adverb) | |
| lasting | |
| long-lasting | |
| long-lived | |
| long-snouted | |
| long-staple | |
| nightlong | |
| prolonged | |
| protracted | |
| strong(feature, action, force, strength, doing) | |
| titanic | |
| agelong | |
| bimestrial | |
| daylong | |
| drawn-out |
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| APA | Smart Define. (2016). long thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/long/thesaurus/related |
| Chicago | Smart Define. 2016. "long thesaurus" https://smartdefine.org/long/thesaurus/related (accessed September 21, 2026). |
| Harvard | Smart Define 2016, long thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/long/thesaurus/related>. |
| MLA | Smart Define. "long thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/long/thesaurus/related> |