(a.) Characteristic of, or relating to, fanaticism; fanatic.

agog ardent at fever pitch authoritarian balking balky bigot bigoted borne bulldogged bulletheaded bullheaded burning case-hardened closed compulsive constricted cramped creedbound deaf deaf to reason delirious distracted dogged dogmatic enthusiastic excessive extravagant extreme extremist fanatic febrile fervent fervid feverish fiery flaming frantic frenetic frenzied furious haggard hard-core hardheaded headstrong heated hectic hidebound hot hotheaded hysteric illiberal immoderate infatuated inflamed inordinate insane insular intolerant irrational little little-minded mad madcap maniacal mean mean-minded mean-spirited monomaniacal mulish narrow narrow-hearted narrow-minded narrow-souled narrow-spirited nearsighted obsessive obstinate opinionated overanxious overdesirous overdevout overeager overenthusiastic overreligious overrighteous overzealous parochial passionate perfervid persevering pertinacious petty pigheaded provincial purblind rabid red-hot restive sanctimonious scorching self-willed set shortsighted small small-minded stiff-necked straitlaced strong-willed strongheaded stubborn stuffy sulky sullen tenacious totally committed ultrareligious ultrazealous uncatholic uncharitable uncooperative ungenerous unliberal unreasonable unregenerate white-hot wild wild-eyed wild-looking willful zealotic zealous