76 entries under smooth topic. ×
| level(noun, adjective, quiet, direct) | |
| flat(adjective, calm, quiet, direct) | |
| even(adjective, adverb, calm, quiet) | |
| plane(noun, adjective, calm, quiet, direct) | |
| recumbent(adjective, flat, low, level) | |
| prone(adjective, low, level, down) | |
| straight(adjective, calm, direct, right) | |
| flush(adjective, calm, quiet, direct) | |
| prostrate(adjective, low, level, down) | |
| direct(adjective, right, flat, solid) | |
| supine(adjective, low, level, down) | |
| decumbent(adjective, low, level, down) | |
| true(adjective, direct, right, flat) | |
| unbroken(adjective, calm, quiet, direct) | |
| uniform(adjective, calm, quiet, right) | |
| uninterrupted(adjective, calm, quiet, direct) | |
| regular(adjective, calm, quiet, right) | |
| right(adjective, direct, flat, solid) | |
| parallel(adjective, calm, direct, right) | |
| plain(adjective, calm, quiet, soft) |
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| APA | Smart Define. (2015). horizontal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/horizontal/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "horizontal thesaurus" https://smartdefine.org/horizontal/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, horizontal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/horizontal/thesaurus/synonyms>. |
| MLA | Smart Define. "horizontal thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/horizontal/thesaurus/synonyms> |