tax write-off vs tax deduction

tax write-off and tax deduction both are nouns.

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

As nouns, tax write-off and tax deduction are synonyms defined as:

tax write-off and tax deduction: a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket

Other synonyms of tax write-off include deduction.

tax write-off (noun)	tax deduction (noun)
a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket	a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket