asinine, balking, balky, bigoted, bovid, bovine, bulldogged, bulletheaded, bullheaded, caprid, caprine, case-hardened, cowish, cowlike, deerlike, dogged, dogmatic, equestrian, equine, fanatic, fixed, goatish, goatlike, hardheaded, headstrong, hircine, hoggish, hoofed, horsy, intolerant, obstinate, opinionated, overzealous, ovine, persevering, pertinacious, perverse, piggish, pigheaded, refractory, restive, ruminant, self-willed, set, sheepish, sheeplike, stiff-necked, strong-willed, strongheaded, stubborn, sulky, sullen, swinish, tenacious, uncooperative, ungovernable, ungulate, unregenerate, unruly, willful, wrongheaded