1
prairie
1
prairie-like(adjective, flat)
1
precise(adjective, calm, smooth, flat, plain)
1
proportionate(adjective, calm, smooth, flat, plain)
1
quiet(adjective, soft, gentle, flat, level)
1
recline(depression, horizontality)
1
rectilineal
1
rectilinear
1
rhythmic(adjective, quiet, soft, gentle, flat)
1
rippleless(adjective, quiet, soft, gentle, flat)
1
ruler-straight
1
same(adjective, calm, direct, smooth, right)
1
sea level
1
sea of grass(expression, idiom)
1
serene(adjective, quiet, soft, gentle, flat)
1
shaven(adjective, quiet, soft, gentle, flat)
1
sheer(adjective, smooth, solid, level, true)
1
shiny(adjective, quiet, soft, gentle, flat)
1
shortest(adjective, direct, right, true, straight)
1
sideways
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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>