curtail vs curtailment

curtail is not a noun while curtailment is a noun.

Word	Noun	Adjective	Verb	Adverb
curtail	No	No	Yes	No
curtailment	Yes	No	No	No

curtail (noun)	curtailment (noun)
	the act of withholding or withdrawing some book or writing from publication or circulation
	the reduction of expenditures in order to become financially stable
	the temporal property of being cut short

curtail (verb)	curtailment (verb)
place restrictions on
terminate or abbreviate before its intended or proper end or its full extent