16
vitriolic(adjective, attack, respect, severe, sharp)
15
burning(adjective, hard, harsh, tender, raw)
15
corrosive(adjective, mean, attack, respect, sharp)
14
astringent(adjective, attack, respect, severe, keen)
14
sour(adjective, strong, severe, sharp, nasty)
14
venomous(adjective, malevolence, discourtesy)
13
sardonic(adjective, mean, strong, severe, evil)
10
poignant(adjective, feeling, strong, hard, sharp)
10
acerb(adjective, mean, evil, sharp, nasty)
10
piercing(adjective, feeling, strong, sharp, nasty)
10
sore(adjective, severe, nasty, harsh, tender)
9
acute(adjective, feeling, strong, severe, keen)
9
hard(adjective, pain, sickness, ache, anguishes)
8
critical(adjective, severe, keen, sharp, harsh)
8
erosive(adjective, burning, corrosive, having a very high ph)
8
raw(adjective, severe, painful, sickness, ache)
8
satiric(adjective, mean, keen, sharp, critical)
8
spiteful(adjective, irritable, malevolence)
7
acidulous
7
agonizing(adjective, pain, painful, sickness, ache)
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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>