4
corroding(adjective, pain, burning, corrosive)
4
cranky(adjective, keen, sharp, lively, unfriendly)
4
crisp(adjective, severe, sharp, cold, unkind)
4
cross(adjective, mean, keen, sharp, harsh)
4
difficult(adjective, sickness, ache, anguishes)
4
embittered(adjective, severe, nasty, hostile, resentful)
4
hateful(adjective, mean, severe, sharp, nasty)
4
hostile(adjective, mean, severe, evil, sharp)
4
intense(adjective, strong, severe, sharp, nasty)
4
irritable(adjective, irritable)
4
malignant
4
painful(adjective, hard, sharp, tender, raw)
4
prickly(adjective, irritable, painful, burning, stinging)
4
rancorous(adjective, severe, nasty, speech, hostile)
4
saddening(adjective, sickness, ache, anguishes)
4
scorching(mean, sharp, nasty, harsh, bitter)
4
stern(adjective, severe)
4
sullen(adjective, mean, severe, sharp, nasty)
4
touchy(adjective, keen, sharp, lively, irritable)
4
truculent(adjective, attack, respect, hostile, hateful)
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APASmart Define. (2015). caustic thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/caustic/thesaurus/synonyms
ChicagoSmart Define. 2015. "caustic thesaurus" https://smartdefine.org/caustic/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, caustic thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/caustic/thesaurus/synonyms>.
MLASmart Define. "caustic thesaurus" 21 July 2015. Web. 22 September 2026. <https://smartdefine.org/caustic/thesaurus/synonyms>