preemptor vs preempt

preemptor and preempt both are nouns.

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

preemptor (noun)	preempt (noun)
a bidder in bridge who makes a preemptive bid	a high bid that is intended to prevent the opposing players from bidding
someone who acquires land by preemption

preemptor (verb)	preempt (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