4
imperturbable(adjective, calm, quiet, cool, still)
4
inanimate(adjective, calm, still, lifeless, inactive)
4
lethargic(adjective, dull, sluggish, lazy, passive)
4
neutral(adjective, quiet, cool, still, peaceful)
4
reposing(adjective, quiet, cool, smooth, slow)
4
resigned(adjective, quiet, flat, indifferent, agreeable)
4
sedate(adjective, calm, quiet, cool, smooth)
4
sleepy(adjective, dull, quiet, flat, indifferent)
4
sluggish(adjective, calm, dull, gentle, lazy)
3
assenting
3
at a standstill(expression, adjective, idiom, calm, quiet)
3
dispassionate(adjective, calm, quiet, cool, smooth)
3
dull(adjective, cold, still, sluggish, lifeless)
3
equable(adjective, quiet, cool, still, peaceful)
3
fallow(adjective, calm, gentle, sluggish, inactive)
3
immotile(calm, still, steady, fixed, impassive)
3
inoperative(adjective, calm, dull, gentle, cold)
3
listless(adjective, quiet, cool, still, peaceful)
3
orderly(adjective, peaceful)
3
potential(adjective, promising)
11 years ago|13k views|share |citing 
APASmart Define. (2015). quiescent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/quiescent/thesaurus/synonyms
ChicagoSmart Define. 2015. "quiescent thesaurus" https://smartdefine.org/quiescent/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, quiescent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/quiescent/thesaurus/synonyms>.
MLASmart Define. "quiescent thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/quiescent/thesaurus/synonyms>