campaigner
Longman Dictionary of Contemporary English OnlineLDOCE Onlinecam·paign·er /kæmˈpeɪnə $ -ər/ ●○○ noun [countable] someone who leads or takes part in actions which are intended to achieve a particular social or political resultcampaigner for a campaigner for greater democracypeace/human rights/environmental campaigners
cam·paign·er nounSyllable
campaigner
See main entry: campaign
See main entry: campaign
especially