Synonyms and related words :
Draconian, acute, cutting, desperate, dire, excessive, exorbitant, extravagant, extreme, fierce, forceful, furious, great, harsh, immoderate, intemperate, intense, keen, outrageous, piercing, potent, powerful, puissant, radical, rigorous, rough, severe, sharp, splitting, strong, tough, unconscionable, vehement, venomous, vigorous, violent, virulent