The term REV UP is a phrase used to describe the act of energizing or increasing the speed of something. The crossword solutions for this term are ENERGIZE (8 letters), AMP (3 letters), and GUNTHEMOTOR (11 letters). ENERGIZE is a verb meaning to give energy or vigor to, while AMP is an abbreviation for ampere, a unit of electrical current. GUNTHEMOTOR is an idiom meaning to increase the speed of something, usually a vehicle.