terrorist group vs Baader Meinhof Gang

terrorist group and Baader Meinhof Gang both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist group	Yes	No	No	No
Baader Meinhof Gang	Yes	No	No	No

terrorist group (noun)	Baader Meinhof Gang (noun)
a political movement that uses terror as a weapon to achieve its goals	a radical left-wing revolutionary terrorist group active in Germany from 1968 until 1977