restrainer vs subduer

restrainer and subduer both are nouns.

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

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

restrainer: a person who directs and restrains
subduer: someone who overcomes and establishes ascendancy and control by force or persuasion

Other hyponyms of restrainer include nazi, overcomer, surmounter, suppresser, suppressor, withholder.

restrainer (noun)	subduer (noun)
a person who directs and restrains	someone who overcomes and establishes ascendancy and control by force or persuasion
a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film