terrorist act vs Brigate Rosse

terrorist act and Brigate Rosse both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist act	Yes	No	No	No
Brigate Rosse	Yes	No	No	No

terrorist act (noun)	Brigate Rosse (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 Marxist-Leninist terrorist organization that arose out of a student protest movement in the late 1960s; wants to separate Italy from NATO and advocates violence in the service of class warfare and revolution; mostly inactive since 1989