protective tariff vs tariff

protective tariff and tariff both are nouns.

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

As nouns, tariff is a hypernym of protective tariff; that is, tariff is a word with a broader meaning than protective tariff:

protective tariff: a tariff imposed to protect domestic firms from import competition
tariff: a government tax on imports or exports

Other hypernyms of protective tariff include duty.

protective tariff (noun)	tariff (noun)
a tariff imposed to protect domestic firms from import competition	a government tax on imports or exports

protective tariff (verb)	tariff (verb)
	charge a tariff