Synonyms and Antonyms of true believer
1 one who is intensely or excessively devoted to a cause it's impossible to argue with those true believers, as they think any counterevidence is proof of an evil conspiracy Synonyms crusader, fanatic, ideologue (also idealogue), militant, partisan (also partizan), red hot, zealotRelated Words activist; dreamer, idealist, visionary; cultist, disciple, follower, hanger-on, idolizer, votary; addict, aficionado (also afficionado), buff, bug, devotee, enthusiast, fan, fancier, fiend, fool, freak, habitué (also habitue), head, hound, junkie (also junky), lover, maniac, maven (also mavin), nut, sucker; advocate, apostle, backer, champion, evangelist, patron, promoter, stalwart, supporter; booster, rooter, well-wisher; faddistNear Antonyms dabbler, dilettanteAntonyms nonmilitant
2 a person who actively supports or favors a cause true believers who fought the good fight even when it was out of fashion Synonyms advocate, advocator, apostle, backer, booster, champion, expounder, espouser, friend, gospeler (or gospeller), herald, hierophant, high priest, paladin, promoter, proponent, protagonist, supporter, exponent, 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
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