The term 'accelerates, with 'UP'' can be broken down into four crossword solutions: REVS (4 letters), AMPS (4 letters), BRISKS (6 letters), and RAMPS (5 letters). REVS stands for revolutions per minute, which is a measure of how fast something is spinning. AMPS stands for amperes, which is a measure of electrical current. BRISKS refers to a quick, lively movement or action. Finally, RAMPS is a term used to describe a steep incline or slope. All of these terms refer to the idea of acceleration, or increasing speed, with the addition of the word 'UP' to indicate a further increase in speed.