Noun
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an additional dose that makes sure the first dose was effective
- booster dose - booster shot - recall dose -
the first stage of a multistage rocket
- booster rocket - booster unit - takeoff booster - takeoff rocket -
an amplifier for restoring the strength of a transmitted signal
- booster amplifier - booster station - relay link - relay station - relay transmitter -
a thief who steals goods that are in a store
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someone who is an active supporter and advocate
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a person who backs a politician or a team etc.
"all their supporters came out for the game"
"they are friends of the library"