terrorist group vs Army of Muhammad

terrorist group and Army of Muhammad both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist group	Yes	No	No	No
Army of Muhammad	Yes	No	No	No

terrorist group (noun)	Army of Muhammad (noun)
a political movement that uses terror as a weapon to achieve its goals	a terrorist organization founded in 2000; a militant Islamic group active in Kashmir and closely aligned with al-Rashid Trust; seeks to secure release of imprisoned fellow militants by kidnappings