protease inhibitor vs antiviral

protease inhibitor and antiviral both are nouns.

Word	Noun	Adjective	Verb	Adverb
protease inhibitor	Yes	No	No	No
antiviral	Yes	Yes	No	No

As nouns, antiviral is a hypernym of protease inhibitor; that is, antiviral is a word with a broader meaning than protease inhibitor:

protease inhibitor: an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs
antiviral: any drug that destroys viruses

Other hypernyms of protease inhibitor include antiviral agent, antiviral drug.

protease inhibitor (noun)	antiviral (noun)
an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs	any drug that destroys viruses

protease inhibitor (adjective)	antiviral (adjective)
	inhibiting or stopping the growth and reproduction of viruses