226 entries under solid topic. ×

18
invariable(adjective, severe, harsh, ordinary)
18
rooted(verb, adjective, strong, hard, secure)
18
steady(adjective, adverb, move, strong, sound)
16
certain(noun, adjective, change, clear, complete)
16
changeless(adjective, severe, firm, harsh)
16
unalterable(adjective, strong, hard, secure, severe)
15
secure(adjective, strong, hard, sound, tough)
14
unvarying(adjective, dull, clear, firm)
13
decided(verb, adjective, set, firm)
13
regular(adjective, firm, exact, proper)
12
motionless(adjective, calm, quiet, strong, secure)
12
sure(adjective, clear, strong, flat, firm)
12
tight(adjective, adverb, close, strong, hard)
12
unmoving(adjective, move, calm, strong, secure)
11
fastened(noun, verb, adjective, strong, sound)
11
frozen(adjective, calm, hard, firm)
11
set in stone(expression, adjective, idiom, mean, hard)
11
tenacious(adjective, strong, sound, secure, tough)
10
abiding(adjective, strong, tough, flat, firm)
10
confirmed(verb, adjective, set, hard, complete)
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APASmart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms
ChicagoSmart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>.
MLASmart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms>