Philistine acclimated acclimatized accommodated accustomed adapted adjusted backed balking balky bigoted brazen bulldogged bulletheaded bullheaded calcified callous calloused conditioned conscienceless crusted crusty crystallized dogged dogmatic experienced familiarized fanatic flinty fossilized granulated hard hardened hardheaded hardhearted headstrong heartless hornified impervious incrusted indurate indurated insensitive intolerant inured lapidified lost to shame mulish naturalized obdurate obstinate opinionated orientated oriented ossified overzealous pachydermatous persevering pertinacious petrified pigheaded proof against reinforced restive rigidified run-in sclerotic seared seasoned self-willed set shameless solidified steeled steeled against steely stiff-necked stiffened stony strengthened strong-willed strongheaded stubborn sulky sullen tenacious thick-skinned toughened trained unblushing uncooperative unregenerate used to vitrified willful wont wonted