disciplinarian vs dictator

disciplinarian and dictator both are nouns.

Word	Noun	Adjective	Verb	Adverb
disciplinarian	Yes	No	No	No
dictator	Yes	No	No	No

As nouns, dictator is a hypernym of disciplinarian; that is, dictator is a word with a broader meaning than disciplinarian:

Other hypernyms of disciplinarian include authoritarian.

disciplinarian (noun)	dictator (noun)
someone who demands exact conformity to rules and forms	a ruler who is unconstrained by law
	a person who behaves in a tyrannical manner
	a speaker who dictates to a secretary or a recording machine