balking balky bigoted bulldogged bulletheaded bullheaded case-hardened dogged dogmatic down-to-earth earthy fanatic hard hard-boiled headstrong hoaxproof intolerant matter-of-fact mulish not born yesterday obstinate opinionated overzealous persevering pertinacious pigheaded positivistic practical practical-minded pragmatic rational realist realistic reasonable restive sane scientific scientistic secular self-willed sensible set sober sober-minded sophisticated sound sound-thinking stiff-necked straight-thinking strong-willed strongheaded stubborn sulky sullen tenacious tough-minded uncooperative uncullible undeceivable undeludable undupable unfoolable ungullible unhoaxable unideal unidealistic unregenerate unromantic unseduceable unsentimental willful wise worldly