Nouns

(n)anguish, torment, tortureextreme mental distress
(n)torture, tormentunbearable physical pain
(n)agony, torment, tortureintense feelings of suffering; acute mental or physical pain“an agony of doubt”, “the torments of the damned”
(n)distortion, overrefinement, straining, torture, twistingthe act of distorting something so it seems to mean something it was not intended to mean
(n)torture, torturingthe deliberate, systematic, or wanton infliction of physical or mental suffering by one or more persons in an attempt to force another person to yield information or to make a confession or for any other reason“it required unnatural torturing to extract a confession”

Verbs

(v)torment, torture, excruciate, racktorment emotionally or mentally
(v)torture, excruciate, tormentsubject to torture“The sinners will be tormented in Hell, according to the Bible”