- Definitions|2
- Thesaurus|1k
- Abbreviations|0
138 entries under adjective topic. ×
| timeless | |
| towering(strong, great, deep, extreme) | |
| unconditional | |
| undying | |
| unlimited | |
| unqualified | |
| very long(expression, long, extended, protracted) | |
| wearisome(difficult, slow, tedious, long) | |
| devious(indirect, winding, meandering) | |
| difficult(protracted, arduous) | |
| empty(wordy, voluble) | |
| epic | |
| free(informal, broad) | |
| grueling | |
| long-drawn | |
| long-lasting(long, drawn-out) | |
| longer | |
| over-long |
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| APA | Smart Define. (2016). lengthy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/lengthy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "lengthy thesaurus" https://smartdefine.org/lengthy/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, lengthy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/lengthy/thesaurus/synonyms>. |
| MLA | Smart Define. "lengthy thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/lengthy/thesaurus/synonyms> |