disciplinarian
[noun]
Synonyms: authoritarian, despot, martinet, stickler, taskmaster, tyrant

[TahlilGaran] English Synonym Dictionary ▲

dis‧ci‧pli‧nar‧i‧an /ˌdɪsəpləˈneəriən, ˌdɪsɪpləˈneəriən $ -ˈner-/ noun [countable]
[Word Family: noun: disciplinarian, discipline; adjective: disciplinary, disciplined ≠ UNDISCIPLINED; verb: discipline]
someone who believes people should obey orders and rules, and who makes them do this:
Dad was a strict disciplinarian.

[TahlilGaran] Dictionary of Contemporary English ▲