The term 'sharp blow' can refer to a variety of different actions, each with its own name. These include slapping (4 letters), rapping (3 letters), swatting (4 letters), thwacking (6 letters), whacking (5 letters), knocking (5 letters), biffing (4 letters), clapping (4 letters), jolting (4 letters), knapping (4 letters), and rabbit punching (11 letters). All of these terms refer to a sudden, forceful impact, usually with the hand or an object.