powerbroker
Noun
Meaning
a person who is important by virtue of the people or votes they control
Source: WordNetSynonyms
autocrat
fixer
activist
kingmaker
lobbyist
pressure group
power broker
logroller
eminence grise
influence peddler
opinion leader
wire-puller
gray eminence
friend at court
gang leader
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Antonyms
Hypernyms
Examples
a power broker who does you a favor will expect you to return it