Other crossword clues for answer "BOOSTERS"BOOSTERSAthletic supporters?Immunization shots, e.g.FansSecond shotsArdent fansPromoters.Amplifiers, in radio.Promoters: Colloq.Opposite of the knockers.Some vaccine shotsStages of space explorationEnthusiastic supportersThey can support your school or immune systemAvid supportersHip ghosts?