Synonyms of 'excruciating'

acute, afflictive, agonizing, atrocious, biting, cruel, distressful, exquisite, extreme, gnawing, grave, hard, harsh, heartbreaking, heartrending, hurtful, insufferable, intense, Keen, painful, piercing, poignant, pungent, severe, sharp, shooting, spasmodic, tearing, unbearable, unendurable, vivid