dictator vs martinet

dictator and martinet both are nouns.

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

As nouns, martinet is a hyponym of dictator; that is, martinet is a word with a more specific, narrower meaning than dictator:

Other hyponyms of dictator include Big Brother, disciplinarian, moralist.

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