Synonyms of the word

disciplinarian

• n. One who exercises discipline.
• n. (by extension) One who believes in discipline as a tool for regulation or control.
• adj. Relating to discipline.

authoritarian

• adj. Of, or relating to, absolute obedience to an authority.
• adj. Characterised by a tyrannical obedience to an authority; dictatorial.
• adj. Tending to impose one's demands upon others as if one were an authority.
• n. One who commands absolute obedience to his or her authority.
• n. One who follows and is excessively obedient to authority.

dictator

• n. A totalitarian leader of a country, nation, or government.
• n. Originally, a magistrate without colleague in republican ancient Rome, who held full executive authority…
• n. A tyrannical boss, or authority figure.
• n. A person who dictates text (e.g. letters to a clerk).
• n. A ruler or Führer, the highest level of authority.

martinet

• n. (military) A strict disciplinarian.
• n. (figuratively) Anyone who lays stress on a rigid adherence to the details of discipline, or to forms and…
• n. A martin; a swift.

moralist

• n. (pejorative) One who drives all decisions on perceived morals, especially one who enforces them with censorship.
• n. (obsolete) A teacher of morals.