terrorist group vs Black September

terrorist group and Black September both are nouns.

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

terrorist group (noun)	Black September (noun)
a political movement that uses terror as a weapon to achieve its goals	a Palestinian international terrorist organization that split from the PLO in 1974; has conducted terrorist attacks in 20 countries