prorate vs proration

prorate is not a noun while proration is a noun.

Word	Noun	Adjective	Verb	Adverb
prorate	No	No	Yes	No
proration	Yes	No	No	No

prorate (noun)	proration (noun)
	the proportional limitation of production or distribution of something (e.g. crude oil or natural gas) to some fractional part of the total capacity of each producer

prorate (verb)	proration (verb)
divide or assess proportionally
make a proportional settlement or distribution