Synonyms and related words :
bigoted, extravagant, extreme, extremist, fanatic, fanatical, haggard, inordinate, irrational, overdevout, overenthusiastic, overrighteous, overzealous, perfervid, rabid, sanctimonious, ultrareligious, ultrazealous, unreasonable, wild-eyed, wild-looking, zealotic, zealous