preemption vs legal right

preemption and legal right both are nouns.

Word	Noun	Adjective	Verb	Adverb
preemption	Yes	No	No	No
legal right	Yes	No	No	No

As nouns, legal right is a hypernym of preemption; that is, legal right is a word with a broader meaning than preemption:

preemption: the right of a government to seize or appropriate something (as property)
legal right: a right based in law

preemption (noun)	legal right (noun)
a prior appropriation of something	a right based in law
the right to purchase something in advance of others
the right of a government to seize or appropriate something (as property)
the judicial principle asserting the supremacy of federal over state legislation on the same subject