68 entries under adjective topic. ×

2
unchanging(clear, sound, steady)
1
regular
1
cool
1
definite(clear, sound, steady)
1
dependable(clear, weak, sound, steady)
1
durable
1
equable
1
indomitable(steadfast, unyielding)
1
permanent
1
predictable(clear, sound, steady)
1
serene
1
solid(weak, loose, wobbly)
1
tranquil
1
undisturbed
1
unfaltering
1
unruffled
0
amiable
0
canny
0
clear(sound, steady)
0
comfortable
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APASmart Define. (2016). unstable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unstable/thesaurus/antonyms
ChicagoSmart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unstable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unstable/thesaurus/antonyms>.
MLASmart Define. "unstable thesaurus" 26 February 2016. Web. 28 September 2026. <https://smartdefine.org/unstable/thesaurus/antonyms>