usurp vs appropriate

usurp is not an adjective while appropriate is an adjective.

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

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

usurp: seize and take control without authority and possibly with force; take as one's right or possession
appropriate: take possession of by force, as after an invasion

Other hyponyms of usurp include annex, capture, conquer, seize, preoccupy, hijack, raid.

usurp (adjective)	appropriate (adjective)
	suitable for a particular person or place or condition etc
	meant or adapted for an occasion or use

usurp (verb)	appropriate (verb)
seize and take control without authority and possibly with force; take as one's right or possession	give or assign a resource to a particular person or cause
take the place of	take possession of by force, as after an invasion