rack vs torment

rack and torment both are nouns.

Word	Noun	Adjective	Verb	Adverb
rack	Yes	No	Yes	No
torment	Yes	No	Yes	No

As verbs, torment is a hypernym of rack; that is, torment is a word with a broader meaning than rack:

Other hypernyms of rack include excruciate, torture.

As verbs, rack and torment are synonyms defined as:

Other synonyms of rack include excruciate, torture.

rack (noun)	torment (noun)
a rapid gait of a horse in which each foot strikes the ground separately	the act of harassing someone
a form of torture in which pain is inflicted by stretching the body	a severe affliction
a support for displaying ot holding various articles	intense feelings of suffering; acute mental or physical pain
an instrument of torture that stretches or disjoints or mutilates victims	extreme mental distress
the destruction or collapse of something	a feeling of intense annoyance caused by being tormented
rib section of a forequarter of veal or pork or especially lamb or mutton	unbearable physical pain

rack (verb)	torment (verb)
torture on the rack	subject to torture
seize together, as of parallel ropes of a tackle in order to prevent running through the block	torment emotionally or mentally
place in a rack	treat cruelly
work on a rack
stretch to the limits
torment emotionally or mentally
go at a rack
draw off from the lees
run before a gale
fly in high wind
obtain by coercion or intimidation
put on a rack and pinion