suppress vs suppressor

suppress is not a noun while suppressor is a noun.

Word	Noun	Adjective	Verb	Adverb
suppress	No	No	Yes	No
suppressor	Yes	No	No	No

suppress (noun)	suppressor (noun)
	an electrical device for suppressing unwanted currents
	a gene that suppresses the phenotypic expression of another gene (especially of a mutant gene)
	someone who suppresses

suppress (verb)	suppressor (verb)
bring under control by force or authority
lessen to the point of stopping
put out of one's consciousness
consciously restrain from showing; of emotions, desires, impulses, or behavior
come down on or keep down by unjust use of one's authority