confederacy

(noun) the southern states that seceded from the United States in 1861. Synonyms: Confederacy, Confederate States, Confederate States of America, South, Dixie, Dixieland.

(noun) a union of political organizations. Synonyms: confederation, federation.

(noun) a group of conspirators banded together to achieve some harmful or illegal purpose. Synonyms: conspiracy.

(noun) a secret agreement between two or more people to perform an unlawful act. Synonyms: conspiracy.