preemptive bid vs pre-empt

preemptive bid and pre-empt both are nouns.

Word	Noun	Adjective	Verb	Adverb
preemptive bid	Yes	No	No	No
pre-empt	Yes	No	No	No

As nouns, preemptive bid and pre-empt are synonyms defined as:

preemptive bid and pre-empt: a high bid that is intended to prevent the opposing players from bidding

Other synonyms of preemptive bid include preempt.

preemptive bid (noun)	pre-empt (noun)
a high bid that is intended to prevent the opposing players from bidding	a high bid that is intended to prevent the opposing players from bidding