“accelerate” means – to cause faster or greater activity, development, progress, advancement
“accelerator” means – a person or thing that accelerates
“excel” means – to surpass others or be superior in some respect or area
ac•cel•er•a•tor/akˈseləˌrātər/
Noun: 1. Something that brings about acceleration, in particular.
2. The device, typically a foot pedal that controls the speed of a vehicle’s engine.
Synonyms: gas pedal