- Definitions|2
- Thesaurus|116
- Abbreviations|0
| abysmal(adjective, wide, unfathomable) | |
| deep(adjective, down, far, unfathomable) | |
| unfathomable | |
| bottomless | |
| cavernous(adjective, wide, unfathomable) | |
| yawning(adjective, wide) | |
| gaping(adjective, wide) | |
| immeasurable(adjective, unfathomable) | |
| seabed | |
| unfathomed | |
| deep sea(expression, idiom) | |
| marine(adjective, sea) | |
| ocean floor | |
| profound | |
| ocean bottom | |
| sea bottom | |
| unlimited | |
| Davy Jones's locker | |
| Neptunian | |
| aquatic(adjective, sea, marine, salty, shore) |
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| APA | Smart Define. (2015). abyssal thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/abyssal/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "abyssal thesaurus" https://smartdefine.org/abyssal/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, abyssal thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/abyssal/thesaurus/synonyms>. |
| MLA | Smart Define. "abyssal thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/abyssal/thesaurus/synonyms> |