suppresser vs restrainer

suppresser and restrainer both are nouns.

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

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

Other hypernyms of suppresser include controller.

suppresser (noun)	restrainer (noun)
an electrical device for suppressing unwanted currents	a person who directs and restrains
a gene that suppresses the phenotypic expression of another gene (especially of a mutant gene)	a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a film
someone who suppresses