Synonyms for Scathing:

adj.

abusive (adjective)
vituperative.
all (adjective)
vituperative.
biting (adjective)
acerbic, stinging, sharp.
brutal (adjective)
cruel, severe, harsh.
carping (adjective)
critical.
caustic (adjective)
pungent.
cutting (adjective)
acid.
incisive (adjective)
slashing.
ironic/ironical (adjective)
acrid.
mordant (adjective)
mordant.
painful (adjective)
stinging.
scathing (adjective)
scorching, cruel, mordant, severe, caustic, biting, trenchant, harsh, mordacious, cutting.
severe (adjective)
severe.
sharp (adjective)
sharp.

n.

ad hominem, blistering, accusing, accusatory. pungent, mordant, cutting, vitriolic, acerbic, acrid, respect, attack, corrosive, biting, acid, trenchant, sharp, truculent, acidic, mordacious, caustic, stinging, astringent. scathing (noun)
critical, vituperative.

v.

attacking (verb)
Scarifying, trouncing, Assaulting, Combating, Charging, barraging, Bombarding, fighting, Lunging, thrusting, Storming, striking, pounding, slashing, Assailing, lashing, hitting, Harrying, raiding, attacking, invading, scorching, battering, raping, savaging, Flaying, Violating, rioting, hammering.
scathe (verb)
attack.

Other synonyms:

mordacious, stinging, astringent, acidic. truculent, mordant, vitriolic, corrosive, cutting. acrid, pungent, biting. acid, trenchant. acerbic. sharp. sarcastic
caustic.
Other relevant words:
caustic, attack, respect, vituperative, astringent, critical, pungent, acerbic, mordacious, harsh, accusatory, cutting, acid, vitriolic, sharp, mordant, cruel, blistering, truculent, biting, severe, acidic, accusing, stinging, trenchant, corrosive, acrid.

Usage examples for scathing

  1. The remarks in question occurred in the great Hawthorne's " Roman Journal," and were certainly sufficiently scathing to call for such warm defence as Margaret's surviving friends hastened to offer. – The Romance of Old New England Rooftrees by Mary Caroline Crawford