agonist vs agony

agonist and agony both are nouns.

Word	Noun	Adjective	Verb	Adverb
agonist	Yes	No	No	No
agony	Yes	No	No	No

agonist (noun)	agony (noun)
(biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction	intense feelings of suffering; acute mental or physical pain
a muscle that contracts while another relaxes	a state of acute pain
someone involved in a contest or battle (as in an agon)
the principal character in a work of fiction