akcelerator

1. (in physics) accelerator; particle accelerator
   Najveći akcelerator na svetu nalazi se u Ženevi. — The world's largest accelerator is in Geneva.
2. (in business) accelerator; startup accelerator
   Naš startap je primljen u akcelerator u Beogradu. — Our startup was accepted into an accelerator in Belgrade.

A car's accelerator pedal is usually called "gas" or "papučica gasa" in Serbian, not "akcelerator".