promoter (n.)

• a
• abettor
• adherent
• admirer
• advocate
• aficionado
• angel
• apologist
• applauder
• appreciator
• architect
• backer
• booster
• buff
• champion
• contriver
• defender
• dependence
• designer
• developer
• deviser
• endorser
• enterpriser
• entrepreneur
• eulogist
• exponent
• extoller
• fan
• framer
• lauder
• lover
• mainstay
• maintainer
• organizer
• panegyrist
• partisan
• patron
• planner
• plugger
• praiser
• projector
• protagonist
• puffer
• reliance
• rooter
• second
• seconder
• sectary
• sider
• sponsor
• stalwart
• standby
• strategian
• strategist
• support
• supporter
• sustainer
• sympathizer
• tactician
• tout
• touter
• upholder
• votary
• well-wisher