seconder

interpreter proponent

backer booster champion defender demonstrator expositor expounder partisan promoter propagandist protagonist second spokesperson supporter upholder

antagonist opponent

advocate backer defender enthusiast exponent partisan patron protector supporter

champion expounder friend second spokesperson subscriber upholder vindicator

antagonist detractor enemy opponent opposition

foe

ally defender follower patron proponent support

abettor adherent bearer booster brace exponent paraclete pillar suspender sustainer upholder

abider

enemy opponent opposition

adversary