Disciplinarian :: Disciplinarian (n.) One who disciplines; one who excels in training, especially with training, especially with regard to order and obedience; one who enforces rigid discipline; a stickler for the observance of rules and methods of training; as, he is a better disciplinarian than scholar..
Disciplinarian :: Disciplinarian (n.) A Puritan or Presbyterian; -- because of rigid adherence to religious or church discipline.
Disciplinary :: Disciplinary (a.) Pertaining to discipline; intended for discipline; corrective; belonging to a course of training.