Synonyms and related words :
acerbic, acid, acidulous, acrid, acrimonious, antagonistic, antipathetic, asperous, astringent, belligerent, biting, bitter, caustic, clashing, colliding, conflicting, cutting, despiteful, double-edged, edged, envenomed, escharotic, fierce, full of hate, harsh, hateful, hostile, incisive, irritating, keen, malevolent, malicious, malignant, mordacious, mordant, nose-tickling, penetrating, piercing, piquant, poignant, pungent, quarrelsome, rancorous, repugnant, rigorous, rough, scathing, set against, severe, sharp, sore, sour, spiteful, stabbing, stinging, strident, stringent, tart, trenchant, vehement, venenate, venomous, violent, virulent