Nouns

(n)torture, tormentunbearable physical pain
(n)anguish, torment, tortureextreme mental distress
(n)agony, torment, tortureintense feelings of suffering; acute mental or physical pain“an agony of doubt”, “the torments of the damned”
(n)harassment, tormenta feeling of intense annoyance caused by being tormented“so great was his harassment that he wanted to destroy his tormentors”
(n)curse, tormenta severe affliction
(n)badgering, worrying, torment, bedevilmentthe act of harassing someone

Verbs

(v)torment, torture, excruciate, racktorment emotionally or mentally
(v)torment, rag, bedevil, crucify, dun, frustratetreat cruelly“The children tormented the stuttering teacher”
(v)torture, excruciate, tormentsubject to torture“The sinners will be tormented in Hell, according to the Bible”