supporter

1 a person who actively supports or favors a cause President Lyndon B. Johnson was a strong supporter of civil rights Synonyms advocate, advocator, apostle, backer, booster, champion, expounder, espouser, friend, gospeler (or gospeller), herald, hierophant, high priest, paladin, promoter, proponent, protagonist, exponent, true believer, tub-thumper, white knightRelated Words loyalist, partisan (also partizan), stalwart; adherent, cohort, disciple, follower; interpreter; applauder, cheerleader, encourager, fellow travelerNear Antonyms enemy, foe, rival; belittler, critic, faultfinderAntonyms adversary, antagonist, opponent

2 someone associated with another to give assistance or moral support even the President's supporters acknowledge that some of the criticism is justified Synonyms abettor (also abetter), backer, bedfellow, confederate, fellow traveler, ally, sympathizerRelated Words empathizer, well-wisher; accessory (also accessary), accomplice, coalitionist, collaborationist, collaborator; adjunct, assistant, coadjutor, helper; associate, cohort, colleague, fellow, partner; buddy, chum, companion, comrade, confidant, crony, familiar, friend, intimate, mate, palNear Antonyms belittler, detractor; adversary, enemy, foe, opponent