100 entries under smooth topic. ×

2
plaster(verb, crush, level, smash)
2
polished(adjective, calm, quiet, soft)
2
prostrate(verb, adjective, crush, low)
2
rolled(adjective, calm, flat, plain)
2
sand(verb, clear, press, level)
2
stable(adjective, calm, quiet, direct)
2
straighten(verb, crush, level, smash)
2
unvarying(adjective, quiet, right, soft)
1
abrade(verb, crush, level, smash)
1
akin(adjective, calm, flat, plain)
1
aligned(adjective, calm, flat, plain)
1
balanced(adjective, calm, direct, right)
1
beat down(verb, expression, phrasal verb, crush)
1
commensurate(adjective, calm, flat, plain)
1
common(adjective, calm, flat, plain)
1
comparable(adjective, calm, flat, plain)
1
consistent(adjective, calm, direct, right)
1
debase(verb, crush, level, smash)
1
depress(verb, crush, level, smash)
1
equable(adjective, calm, quiet, soft)
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APASmart Define. (2015). plane thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/plane/thesaurus/synonyms
ChicagoSmart Define. 2015. "plane thesaurus" https://smartdefine.org/plane/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, plane thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/plane/thesaurus/synonyms>.
MLASmart Define. "plane thesaurus" 24 October 2015. Web. 24 September 2026. <https://smartdefine.org/plane/thesaurus/synonyms>