The term 'accelerates sharply' can be represented by two crossword solutions: REVS and REVSUP. REVS stands for 'revolutions, ' which is a measure of how many times a rotating object turns around its axis in a given period of time. REVSUP stands for 'rev up, ' which is an expression used to describe the act of increasing the speed of an engine or motor. Therefore, the two crossword solutions together represent the idea of accelerating quickly or sharply.