booster

Something that boosts.

The first stage of a multistage rocket that provides the thrust for liftoff and the initial flight

A motor-generator set used for voltage regulation in direct current electrical power circuits.

Someone who is a fan or supporter of something.

Someone who promotes a town or business

A member of a booster club.

A booster dose.

When did you get your last tetanus booster?

A term that serves to amplify or strengthen an utterance, such as "really".

A power-up item.

A package of cards or figurines designed to add to a player's collection.

A thief.

The security guard captured two boosters before they could exit the retail store.