foreign terrorist organization vs KKK

foreign terrorist organization and KKK both are nouns.

Word	Noun	Adjective	Verb	Adverb
foreign terrorist organization	Yes	No	No	No
KKK	Yes	No	No	No

foreign terrorist organization (noun)	KKK (noun)
a political movement that uses terror as a weapon to achieve its goals	a secret society of white Southerners in the United States; was formed in the 19th century to resist the emancipation of slaves; used terrorist tactics to suppress Black people