Abu Nidal Organization vs terrorist group

Abu Nidal Organization and terrorist group both are nouns.

Word	Noun	Adjective	Verb	Adverb
Abu Nidal Organization	Yes	No	No	No
terrorist group	Yes	No	No	No

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