noun a person who backs a politician or a team etc..
— synonyms: supporter, protagonist, champion, admirer, friend
noun someone who is an active supporter and advocate.
— synonyms: promoter, plugger
noun a thief who steals goods that are in a store.
— synonyms: shoplifter, lifter
noun an amplifier for restoring the strength of a transmitted signal.
— synonyms: booster_amplifier, booster_station, relay_link, relay_station, relay_transmitter
noun the first stage of a multistage rocket.
— synonyms: booster_rocket, booster_unit, takeoff_booster, takeoff_rocket
noun an additional dose that makes sure the first dose was effective.
— synonyms: booster_dose, booster_shot, recall_dose