4
boiling(adjective, irritation, annoyance, discontent, irritability)
4
corrosive(adjective, mean, sharp, nasty, bitter)
4
dour(adjective, tough, severe, low, sad)
4
fierce(adjective, severe, nasty, hostile, bitter)
4
fuming(adjective, irritation, annoyance, discontent, irritability)
4
grim(adjective, tough, severe, harsh, cruel)
4
mordacious(adjective, malevolence, biting)
4
morose(adjective, mean, tough, severe, nasty)
4
piercing
4
piquant(adjective, strong, hard, severe, unpleasant)
4
querulous(adjective, mean, cross, irritable, ugly)
4
raging(adjective, irritation, animated, annoyance, discontent)
4
rigorous(adjective, tough, severe, harsh, grim)
4
strident(adjective, conflicting, dissenting, disagreeing, frictional)
4
violent(resentment, animated, frenzied, impassioned)
4
waspish(adjective, mean, cross, irritable, disagreeable)
4
withering
3
acetous
3
acidic
3
angered(adjective, irritation, annoyance, discontent, irritability)
11 years ago|20k views|share |citing 
APASmart Define. (2015). acrimonious thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/acrimonious/thesaurus/synonyms
ChicagoSmart Define. 2015. "acrimonious thesaurus" https://smartdefine.org/acrimonious/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, acrimonious thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/acrimonious/thesaurus/synonyms>.
MLASmart Define. "acrimonious thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/acrimonious/thesaurus/synonyms>