booster

Noun

• an additional dose that makes sure the first dose was effective

• the first stage of a multistage rocket

• an amplifier for restoring the strength of a transmitted signal

• a thief who steals goods that are in a store

• someone who is an active supporter and advocate

• a person who backs a politician or a team etc.
  • all their supporters came out for the game
    
  • they are friends of the library
    

Related words

• Synonyms: 
  booster dose , booster shot , recall dose , booster rocket , booster unit , takeoff booster , takeoff rocket , booster amplifier , booster station , relay link , relay station , relay transmitter , shoplifter , lifter , promoter , plugger , supporter , protagonist , champion , admirer , friend