tax vs unearned revenue

tax and unearned revenue both are nouns.

Word	Noun	Adjective	Verb	Adverb
tax	Yes	No	Yes	No
unearned revenue	Yes	No	No	No

tax (noun)	unearned revenue (noun)
charge against a citizen's person or property or activity for the support of government	(accounting) income received but not yet earned (usually considered a current liability on a company's balance sheet)
	personal income that you did not earn (e.g., dividends or interest or rent income)

tax (verb)	unearned revenue (verb)
make a charge against or accuse
use to the limit
levy a tax on
set or determine the amount of (a payment such as a fine)