torment vs rack

torment and rack both are nouns.

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

As verbs, rack is a hyponym of torment; that is, rack is a word with a more specific, narrower meaning than torment:

Other hyponyms of torment include martyr, martyrise, martyrize.

As verbs, torment and rack are synonyms defined as:

Other synonyms of torment include excruciate, torture.

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

torment (verb)	rack (verb)
subject to torture	torture on the rack
torment emotionally or mentally	seize together, as of parallel ropes of a tackle in order to prevent running through the block
treat cruelly	place in a rack
	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