28 entries under stiff topic. ×

9
stony(adjective, firm, rigid)
7
solid(adjective, hard, firm, compact)
6
hard(adjective, strong, firm, substantial)
6
rocky(adjective, firm, difficult, rigid)
5
tough(adjective, firm, difficult, rigid)
4
firm(adjective, strong, hard, substantial)
4
unyielding(adjective, hard, firm, compact)
3
dense(adjective, strong, hard, firm, substantial)
3
inflexible(adjective, firm, rigid, unyielding)
3
rigid(adjective, firm)
2
adamantine(adjective, firm, rigid)
2
callous(adjective, firm, rigid)
2
compressed(adjective, firm, compact, rigid)
2
hardened(adjective, firm, rigid)
1
compact(adjective, strong, hard, firm, substantial)
1
compacted(adjective, strong, hard, firm, substantial)
1
concentrated(adjective, strong, hard, firm, substantial)
1
consolidated(adjective, strong, hard, firm, substantial)
1
impenetrable(adjective, firm, rigid)
1
iron(adjective, firm, rigid, steel)
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APASmart Define. (2015). rocklike thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rocklike/thesaurus/synonyms
ChicagoSmart Define. 2015. "rocklike thesaurus" https://smartdefine.org/rocklike/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, rocklike thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rocklike/thesaurus/synonyms>.
MLASmart Define. "rocklike thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/rocklike/thesaurus/synonyms>