(n.) One who is wholly devoted; esp., one given wholly to religion; one who is superstitiously given to religious duties and ceremonies; a bigot.

Christian God-fearing man accepter addict adherent admirer aficionado amateur aspirant aspirer believer booster buff bug candidate catechumen churchgoer churchite churchman collector communicant convert coveter crank daily communicant desirer devotionalist dilettante disciple energumen enthusiast fan fanatic fanatico fancier fiend follower freak good Christian groupie habitue hankerer head hopeful hound idolater idolizer infatuate junkie lover lunatic fringe monomaniac neophyte nut pietist proselyte receiver religionist rooter saint solicitant suitor theist truster votary wanter wisher worshiper yearner zealot