13
carcass(noun, body, remains, skeleton, corpse)
13
dear(adjective, fancy, difficult, harsh, informal)
13
high(adjective, fancy, extraordinary, crazy, noble)
13
potent(adjective, strong, great, severe, firm)
13
remains(noun, body, skeleton, corpse, carcass)
13
starchy(adjective, hard, firm, proper, grand)
12
cold(adjective, hard, severe, harsh, careless)
12
expensive(adjective, fancy, clean, informal, extraordinary)
12
fresh(adjective, pleasant, wholesome, unpolluted, airy)
12
mannered(adjective, awkward, refined, affected, pretentious)
12
punctilious(adjective, characteristic, hard, correct, severe)
12
rigorous(adjective, hard, severe, rough, difficult)
12
stern(adjective, hard, severe, rough, firm)
11
adamantine(adjective, firm, determined, resolute, rigid)
11
cruel(adjective, hard, severe, rough, harsh)
11
dense(adjective, set, strong, hard, tough)
11
excessive(adjective, fancy, severe, extraordinary, unreasonable)
11
hard-nosed(adjective, hard, severe, rough, firm)
11
intractable(adjective, hard, tough, rough, firm)
11
laborious(adjective, hard, tough, severe, rough)
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APASmart Define. (2015). stiff thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, stiff thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>.
MLASmart Define. "stiff thesaurus" 24 December 2015. Web. 22 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms>