replace vs usurp

replace and usurp both are verbs.

Word	Noun	Adjective	Verb	Adverb
replace	No	No	Yes	No
usurp	No	No	Yes	No

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

Other hyponyms of replace include deputise, deputize, step in, substitute, displace, preempt, oust.

replace (verb)	usurp (verb)
substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)	seize and take control without authority and possibly with force; take as one's right or possession
put something back where it belongs	take the place of
put in the place of another; switch seemingly equivalent items
take the place or move into the position of