terrorist act vs Ku Klux Klan

terrorist act and Ku Klux Klan both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist act	Yes	No	No	No
Ku Klux Klan	Yes	No	No	No

terrorist act (noun)	Ku Klux Klan (noun)
the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear	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