extort vs rob

extort and rob both are verbs.

Word	Noun	Adjective	Verb	Adverb
extort	No	No	Yes	No
rob	No	No	Yes	No

As verbs, rob is a hypernym of extort; that is, rob is a word with a broader meaning than extort:

Other hypernyms of extort include fleece, gazump, hook, overcharge, pluck, plume, soak, surcharge.

extort (verb)	rob (verb)
get or cause to become in a difficult or laborious manner	take something away by force or without the consent of the owner
obtain by coercion or intimidation	rip off; ask an unreasonable price
obtain through intimidation