tax vs tariff

tax and tariff both are nouns.

Word	Noun	Adjective	Verb	Adverb
tax	Yes	No	Yes	No
tariff	Yes	No	Yes	No

As verbs, tariff is a hyponym of tax; that is, tariff is a word with a more specific, narrower meaning than tax:

Other hyponyms of tax include excise, surtax, overtax.

tax (noun)	tariff (noun)
charge against a citizen's person or property or activity for the support of government	a government tax on imports or exports

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