1
silky(adjective, quiet, soft, gentle, flat)
1
sit down(verb, phrasal verb, depression, horizontality)
1
sleek(adjective, quiet, soft, gentle, flat)
1
smoothed out
1
smoothened
1
soft(adjective, quiet, gentle, flat, level)
1
soothing(adjective, quiet, soft, gentle, flat)
1
sphere
1
square(direct, smooth, right, flat, solid)
1
squashed
1
squashed flat
1
steppe
1
still(adjective, quiet, soft, gentle, flat)
1
straight-cut
1
straight-front
1
straight-side
1
straight ahead(expression, adjective, direct, right, true)
1
straightaway(adjective, direct, right, true, straight)
1
streamlined
1
stretched out
11 years ago|12k views|share |citing 
APASmart Define. (2015). horizontal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/horizontal/thesaurus/synonyms
ChicagoSmart Define. 2015. "horizontal thesaurus" https://smartdefine.org/horizontal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, horizontal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/horizontal/thesaurus/synonyms>.
MLASmart Define. "horizontal thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/horizontal/thesaurus/synonyms>