4
dense(adjective, close, strong, hard, firm)
4
dogged
4
endless(adjective, regular, persistent, constant, continuous)
4
equitable(adjective, reasonable, just, impartial)
4
eternal(adjective, wild, steady, regular, persistent)
4
formidable(adjective, strong)
4
frozen(adjective, calm, quiet, hard, still)
4
hale(adjective, strong, sound, complete, tough)
4
imperturbable(adjective, calm, smooth, firm, solid)
4
inactive(adjective, action, calm, mild, still)
4
incessant(adjective, steady, regular, persistent, even)
4
intact(complete, clean, solid, pure, vigorous)
4
kennel
4
measured(calm, reasonable, easy, relaxed, restrained)
4
monotonous(adjective, quiet, soft, gentle, flat)
4
patient(calm, easy, relaxed, steady, comfortable)
4
predictable(adjective, good, strong, honest, solid)
4
restrained(adjective, reasonable, self-controlled)
4
shelter
4
sober(adjective, calm, quiet, sound, reasonable)
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APASmart Define. (2015). stable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/stable/thesaurus/synonyms
ChicagoSmart Define. 2015. "stable thesaurus" https://smartdefine.org/stable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, stable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/stable/thesaurus/synonyms>.
MLASmart Define. "stable thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/stable/thesaurus/synonyms>