9
fossilized
7
hardened(verb, adjective, hard, firm, solid)
5
adamantine(adjective, determined, resolute, uncompromising, unshakeable)
5
intransigent(adjective, determined, resolute, uncompromising, unshakeable)
5
petrified(verb, adjective, hard, firm, solid)
5
stubborn(adjective, characteristic, quality, determined, resolute)
4
adamant(adjective, determined, resolute, uncompromising, unshakeable)
4
fossilised
4
hard(adjective, firm, solid, determined, resolute)
4
inactive(adjective, action, lazy, inert, motionless)
4
inflexible(adjective, firm, solid, determined, normal)
4
set(adjective, hard, firm, solid, heavy)
4
stiffened
4
unrelenting(adjective, determined, resolute, uncompromising, unshakeable)
3
bony(adjective, hardened, scrawny, skinny, petrified)
3
congealed(verb, adjective, set, hard, firm)
3
fixed(verb, adjective, set, firm, solid)
3
solidified(adjective, set, hard, firm, solid)
3
stiff(adjective, set, hard, firm, solid)
3
unbending(adjective, firm, solid, determined, resolute)
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APASmart Define. (2015). ossified thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/ossified/thesaurus/synonyms
ChicagoSmart Define. 2015. "ossified thesaurus" https://smartdefine.org/ossified/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, ossified thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ossified/thesaurus/synonyms>.
MLASmart Define. "ossified thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/ossified/thesaurus/synonyms>