sufferer vs suffer

sufferer is a noun but suffer is not a noun.

Word	Noun	Adjective	Verb	Adverb
sufferer	Yes	No	No	No
suffer	No	No	Yes	No

sufferer (noun)	suffer (noun)
a person suffering from an illness
one who suffers for the sake of principle

sufferer (verb)	suffer (verb)
	be in pain
	undergo (as of injuries and illnesses)
	feel unwell or uncomfortable
	get worse in quality
	be set at a disadvantage
	put up with something or somebody unpleasant
	experience (emotional) pain
	feel physical pain
	undergo or be subjected to
	undergo or suffer
	be given to