preempt vs preemption

preempt and preemption both are nouns.

Word	Noun	Adjective	Verb	Adverb
preempt	Yes	No	Yes	No
preemption	Yes	No	No	No

preempt (noun)	preemption (noun)
a high bid that is intended to prevent the opposing players from bidding	a prior appropriation of something
	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

preempt (verb)	preemption (verb)
acquire for oneself before others can do so
make a preemptive bid in the game of bridge
gain possession of by prior right or opportunity, especially so as to obtain the right to buy (land)
take the place of or have precedence over