Agony
Part of speech: noun
Definition: Violent contest or striving. Pain so extreme as to cause writhing or contortions of the body, similar to those made in the athletic contests in Greece; and hence, extreme pain of mind or body; anguish; paroxysm of grief; specifically, the sufferings of Christ in the garden of Gethsemane. Paroxysm of joy; keen emotion. The last struggle of life; death struggle.
Example sentence: There is no greater agony than bearing an untold story inside you.
Suffering
Part of speech: adjective
Definition: Experiencing pain.
Part of speech: verb
Definition: To undergo hardship.
Part of speech: noun
Definition: The condition of someone who suffers; a state of pain or distress.
Example sentence: The reward of suffering is experience.