acanaceous, acerb, acerbate, acerbic, acid, acidic, acidulent, acidulous, acrid, acrimonious, aculeolate, acute, afflictive, agonizing, asperous, astringent, atrocious, biting, bitter, brambly, briery, brisk, bristly, burn, burning, burning pain, buzz, caustic, chafing, corroding, corrosive, cramping, cruel, cutting, distressing, double-edged, edged, escharotic, excruciating, fierce, fire, fretting, galling, gnawing, grating, grave, grinding, griping, hard, harrowing, harsh, hurtful, hurting, incisive, irritant, irritating, irritative, keen, mordacious, mordant, muricate, nose-tickling, painful, paresthesia, paroxysmal, penetrating, piercing, pins and needles, piquant, poignant, pricking, prickle, prickles, prickling, prickly, pricky, pungent, racking, rasping, rigorous, rough, scathing, scorching, scratchy, severe, sharp, shooting, smart, smarting, sour, spasmatic, spasmic, spasmodic, stabbing, sting, strident, stringent, tart, thistly, thorny, thrill, tingle, tingling, tormenting, torturous, trenchant, urtication, vehement, violent, virulent, vitriolic, withering