125 entries under reasonable topic. ×

6
prudent(adjective, honest, sensible, fair)
6
self-controlled(adjective, calm, quiet, gentle)
5
low-key(adjective, calm, quiet, soft)
5
pacific(adjective, calm, quiet, soft)
4
abnegating(adjective, calm, quiet, sensible)
4
cautious(adjective, sensible, alert, modest)
4
continent(adjective, quiet, simple, moderate)
4
muted(verb, adjective, calm, close, quiet)
4
self-restrained(adjective, quiet, moderate, gentle)
4
soft(adjective, calm, close, quiet)
4
stable(adjective, self-controlled)
4
staid(adjective, calm, good, quiet, correct)
4
unruffled(adjective, calm, quiet, sensible)
3
circumspect(adjective, sensible, fair, proper)
3
measured(adjective, calm, soft, moderate)
3
mild(adjective, calm, close, quiet)
3
sedate(adjective, calm, good, close, quiet)
3
sensible(adjective, moderate, honest, fair)
3
serene(adjective, calm, close, quiet)
2
abstemious(adjective, pure, behavior, temperate)
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APASmart Define. (2015). restrained thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/restrained/thesaurus/synonyms
ChicagoSmart Define. 2015. "restrained thesaurus" https://smartdefine.org/restrained/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, restrained thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/restrained/thesaurus/synonyms>.
MLASmart Define. "restrained thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/restrained/thesaurus/synonyms>