nazi vs restrainer

nazi and restrainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
nazi	Yes	No	No	No
restrainer	Yes	No	No	No

As nouns, restrainer is a hypernym of nazi; that is, restrainer is a word with a broader meaning than nazi:

nazi: derogatory term for a person who is fanatically dedicated to, or seeks to control, some activity, practice, etc.
restrainer: a person who directs and restrains

Other hypernyms of nazi include controller.

nazi (noun)	restrainer (noun)
derogatory term for a person who is fanatically dedicated to, or seeks to control, some activity, practice, etc.	a person who directs and restrains
	a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film