100 entries under smooth topic. ×

4
lay(verb, calm, quiet, clear, press)
4
mow(verb, cut, reduce, crush)
4
polish(verb, adjective, clear, press)
3
calm(verb, adjective, quiet, flat)
3
dead flat(expression, adjective, idiom, flat)
3
planar(adjective, even)
3
planate(adjective, calm, quiet, direct)
3
silken(verb, smoothness)
3
slick(verb, clear, press, level)
3
smoothen(verb, crush, smash, flatten)
3
square(noun, adjective, direct, right)
3
steady(verb, adjective, calm, quiet)
3
trim(verb, adjective, calm, cut)
2
alike(adjective, calm, direct, right)
2
compress(verb, crush, level, smash)
2
constant(adjective, calm, right, flat)
2
deflate(verb, crush, level, smash)
2
equalize(verb, crush, smash, match)
2
matching(adjective, calm, direct, right)
2
parallel(adjective, calm, direct, right)
10 years ago|18k views|share |citing 
APASmart Define. (2015). plane thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/plane/thesaurus/synonyms
ChicagoSmart Define. 2015. "plane thesaurus" https://smartdefine.org/plane/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, plane thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/plane/thesaurus/synonyms>.
MLASmart Define. "plane thesaurus" 24 October 2015. Web. 23 September 2026. <https://smartdefine.org/plane/thesaurus/synonyms>