usurper vs claim jumper

usurper and claim jumper both are nouns.

Word	Noun	Adjective	Verb	Adverb
usurper	Yes	No	No	No
claim jumper	Yes	No	No	No

As nouns, claim jumper is a hyponym of usurper; that is, claim jumper is a word with a more specific, narrower meaning than usurper:

usurper: one who wrongfully or illegally seizes and holds the place of another
claim jumper: one who illegally occupies property to which another has a legal claim

usurper (noun)	claim jumper (noun)
one who wrongfully or illegally seizes and holds the place of another	one who illegally occupies property to which another has a legal claim