Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun protester

2 senses of protester

Sense 1
dissenter, dissident, protester, objector, contestant -- (a person who dissents from some established policy)
       => person, individual, someone, somebody, mortal, soul -- (a human being; "there was too much for one person to do")

Sense 2
demonstrator, protester -- (someone who participates in a public display of group feeling)
       => reformer, reformist, crusader, social reformer, meliorist -- (a disputant who advocates reform)