Synonyms and related words :
ass, bigot, bitter-ender, bullethead, diehard, doctrinaire, dogmatist, dogmatizer, donkey, fanatic, hardnose, infallibilist, intransigeant, intransigent, last-ditcher, maverick, mule, opinionist, perverse fool, pighead, practical person, pragmatist, purist, realist, standpat, standpatter, stickler