900 entries under adjective topic. ×

15
polite(kind, pleasant, gentle, sensitive)
15
serene(calm, quiet, light, cool)
15
silken(verb, soft, easy, thin)
15
sly(mean, keen, sharp, smart)
15
unruffled(calm, quiet, cool, easy)
14
clear(verb, calm, open, press)
14
horizontal(calm, direct, right, flat)
14
plain(calm, clear, light, weak)
13
artful(sharp, informal, intelligent, cunning)
13
balmy(calm, quiet, appearance, strong)
13
crafty(mean, keen, sharp, smart)
13
flowing(calm, quiet, style, light)
13
hypocritical(offensive, coarse, deceitful, excessive)
13
mellow(verb, calm, quiet, cool)
13
regular(calm, right, flat, level)
13
scheming(mean, cunning, deceitful, subtle)
13
simple(clear, light, easy, straightforward)
13
tricky(sharp, intelligent, cunning, clever)
13
uniform(calm, right, flat, level)
12
courteous(sensitive, polite, refined, behaviour)
10 years ago|61k views|share |citing 
APASmart Define. (2015). smooth thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/smooth/thesaurus/synonyms
ChicagoSmart Define. 2015. "smooth thesaurus" https://smartdefine.org/smooth/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, smooth thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/smooth/thesaurus/synonyms>.
MLASmart Define. "smooth thesaurus" 23 December 2015. Web. 24 September 2026. <https://smartdefine.org/smooth/thesaurus/synonyms>