132 entries under level topic. ×

5
invariable(adjective, quiet, soft, gentle)
5
precise(adjective, calm, smooth, plain)
5
punctured(adjective, smooth)
5
quiet(adjective, soft, gentle, slow)
5
reclining(adjective, smooth, even, lying)
5
stable(adjective, calm, quiet, strong, direct)
5
unruffled(adjective, quiet, soft, gentle)
4
equable(adjective, calm, quiet, kind, smooth)
4
fallen(adjective, smooth)
4
glassy(adjective, quiet, smooth, soft, gentle)
4
horizontally(adverb, position, flatly)
4
laid low(adjective, smooth)
4
outstretched(adjective, smooth)
4
planate(adjective, calm, quiet, direct, smooth)
4
polished(adjective, calm, quiet, smooth, soft)
4
sleek(adjective, quiet, smooth, soft, gentle)
4
soft(adjective, dull, quiet, weak, kind)
4
spread out(adjective, smooth)
4
square(adjective, dull, direct, smooth, simple)
4
undeviating(adjective, quiet, strong, direct, smooth)
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APASmart Define. (2016). flat thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/flat/thesaurus/synonyms
ChicagoSmart Define. 2016. "flat thesaurus" https://smartdefine.org/flat/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, flat thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/flat/thesaurus/synonyms>.
MLASmart Define. "flat thesaurus" 1 March 2016. Web. 21 September 2026. <https://smartdefine.org/flat/thesaurus/synonyms>