write-off vs write off

write-off is a noun but write off is not a noun.

Word	Noun	Adjective	Verb	Adverb
write-off	Yes	No	No	No
write off	No	No	Yes	No

write-off (noun)	write off (noun)
the act of cancelling from an account a bad debt or a worthless asset
(accounting) reduction in the book value of an asset

write-off (verb)	write off (verb)
	reduce the estimated value of something
	concede the loss or worthlessness of something or somebody
	write something fluently, and without hesitation
	cancel (a debt)