148 entries under serene topic. ×

2
self-assured(adjective, calm, relaxed, tranquil, easygoing)
2
sequestered(adjective, shy, stable, peaceful, tranquil)
2
unconcerned(adjective, calm, quiet, cool, moderate)
1
cold-blooded(adjective, cool, blank, aloof, unemotional)
1
isolated(adjective, shy, stable, peaceful, tranquil)
1
nonviolent(adjective, calm, quiet, friendly, easygoing)
1
secluded(adjective, shy, stable, peaceful, tranquil)
1
all quiet(expression, calm, quiet, friendly)
1
calmed(adjective, calm, relaxed, tranquil, easygoing)
1
clearheaded(adjective, calm, relaxed, tranquil, easygoing)
1
cold(adjective, calm, close, quiet, cool)
1
commonsensical(adjective, calm, relaxed, tranquil, easygoing)
1
constant(calm, quiet, smooth, friendly, steady)
1
cool as cucumber(expression, adjective, idiom, calm, quiet)
1
deliberate(adjective, calm, quiet, cool, relaxed)
1
disimpassioned(adjective, calm, cool, relaxed, casual)
1
dry(adjective, calm, clear, cool, bright)
1
emotionless(adjective, calm, cool, blank, aloof)
1
fixed(adjective, calm, quiet, smooth, shy)
1
free from strife(expression, idiom, calm, quiet, friendly)
10 years ago|22k views|share |citing 
APASmart Define. (2016). placid thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/placid/thesaurus/synonyms
ChicagoSmart Define. 2016. "placid thesaurus" https://smartdefine.org/placid/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, placid thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/placid/thesaurus/synonyms>.
MLASmart Define. "placid thesaurus" 29 February 2016. Web. 30 September 2026. <https://smartdefine.org/placid/thesaurus/synonyms>