terrorist group vs Black September Movement

terrorist group and Black September Movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist group	Yes	No	No	No
Black September Movement	Yes	No	No	No

terrorist group (noun)	Black September Movement (noun)
a political movement that uses terror as a weapon to achieve its goals	a former Palestinian terrorist organization (now merged with Fatah Revolutionary Council) that assassinated the Prime Minister of Jordan and during the 1972 Olympic Games in Munich killed 11 Israeli athletes