relieve vs reliever

relieve is not a noun while reliever is a noun.

Word	Noun	Adjective	Verb	Adverb
relieve	No	No	Yes	No
reliever	Yes	No	No	No

relieve (noun)	reliever (noun)
	a pitcher who does not start the game
	someone who takes the place of another (as when things get dangerous or difficult)
	a person who reduces the intensity (e.g., of fears) and calms and pacifies

relieve (verb)	reliever (verb)
provide physical relief, as from pain
provide relief for
alleviate or remove (pressure or stress) or make less oppressive
relieve oneself of troubling information
grant exemption or release to
lessen the intensity of or calm
take by stealing
free from a burden, evil, or distress
save from ruin, destruction, or harm
free someone temporarily from his or her obligations
grant relief or an exemption from a rule or requirement to