162 entries under smooth topic. ×

2
mellow(adjective, calm, weak, kind)
2
nothing(adjective, dull, weak, simple)
2
pabulum(adjective, dull, weak, simple)
2
pacific(adjective, calm, weak, kind)
2
parallel(adjective, calm, direct, right)
2
placid(adjective, calm, dull, quiet, weak)
2
rolled(adjective, calm, plain, level)
2
satiny
2
shiny(adjective, quiet, soft, gentle)
2
slithery
2
tender(adjective, calm, kind, soft)
2
unwrinkled(adjective, direct, right, level)
1
akin(adjective, calm, plain, level)
1
aligned(adjective, calm, plain, level)
1
balmy(adjective, calm, weak, kind)
1
burnished
1
clement(adjective, calm, weak, kind)
1
commensurate(adjective, calm, plain, level)
1
comparable(adjective, calm, plain, level)
1
complanate(adjective, level)
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APASmart Define. (2016). flat thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/flat/thesaurus/synonyms
ChicagoSmart Define. 2016. "flat thesaurus" https://smartdefine.org/flat/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, flat thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/flat/thesaurus/synonyms>.
MLASmart Define. "flat thesaurus" 1 March 2016. Web. 22 September 2026. <https://smartdefine.org/flat/thesaurus/synonyms>