51 entries under plane topic. ×

31
uninterrupted(adjective, calm, quiet, direct, sound)
19
unbroken(verb, adjective, calm, quiet, direct)
15
steady(adjective, calm, quiet, complete, smooth)
12
regular(verb, adjective, calm, quiet, sound)
11
even(verb, adjective, adverb, calm, quiet)
11
level(adjective, quiet, direct, smooth, right)
10
stable(adjective, calm, quiet, direct, smooth)
9
uniform(adjective, calm, quiet, smooth, right)
8
flat(adjective, calm, quiet, direct, smooth)
8
invariable(adjective, quiet, smooth, soft, gentle)
8
smooth(adjective, calm, direct, right, flat)
8
unvarying(adjective, quiet, smooth, right, soft)
6
undeviating(adjective, quiet, direct, smooth, right)
5
flush(adjective, calm, quiet, direct, smooth)
5
monotonous(adjective, quiet, soft, gentle, flat)
3
equable(adjective, calm, quiet, smooth, soft)
2
horizontal(adjective, calm, quiet, direct, smooth)
2
plain(adjective, calm, quiet, smooth, soft)
2
planate(adjective, calm, quiet, direct, smooth)
2
unruffled(verb, adjective, quiet, sound, soft)
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APASmart Define. (2015). continuous thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/continuous/thesaurus/synonyms
ChicagoSmart Define. 2015. "continuous thesaurus" https://smartdefine.org/continuous/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, continuous thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/continuous/thesaurus/synonyms>.
MLASmart Define. "continuous thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/continuous/thesaurus/synonyms>