highly active antiretroviral therapy vs protease inhibitor

highly active antiretroviral therapy and protease inhibitor both are nouns.

Word	Noun	Adjective	Verb	Adverb
highly active antiretroviral therapy	Yes	No	No	No
protease inhibitor	Yes	No	No	No

highly active antiretroviral therapy (noun)	protease inhibitor (noun)
a combination of protease inhibitors taken with reverse transcriptase inhibitors; used in treating AIDS and HIV	an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs