Red Brigades vs terrorist organization

Red Brigades and terrorist organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
Red Brigades	Yes	No	No	No
terrorist organization	Yes	No	No	No

Red Brigades (noun)	terrorist organization (noun)
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	a political movement that uses terror as a weapon to achieve its goals