Synonyms and related words :
acerbity, acidity, acidness, acidulousness, acridity, acrimony, asperity, astringency, bite, bitingness, bitterness, causticity, causticness, corrosiveness, cuttingness, drive, edge, effectiveness, fierceness, force, forcefulness, grip, guts, harshness, impressiveness, incisiveness, keenness, mordacity, nervosity, nervousness, piercingness, piquancy, poignancy, point, power, punch, pungency, rigor, roughness, severity, sharpness, sinew, sinewiness, sourness, stabbingness, sting, strength, stridency, stringency, strong language, tartness, teeth, trenchancy, vehemence, vigor, vigorousness, violence, virulence, vitality