terrorist act vs Revolutionary Proletarian Nucleus

terrorist act and Revolutionary Proletarian Nucleus both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist act	Yes	No	No	No
Revolutionary Proletarian Nucleus	Yes	No	No	No

terrorist act (noun)	Revolutionary Proletarian Nucleus (noun)
the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear	a clandestine group of leftist extremists who oppose Italy's labor policies and foreign policy; responsible for bombing building in the historic center of Rome from 2000 to 2002