Confederacy vs Confederate States

Confederacy and Confederate States both are nouns.

Word	Noun	Adjective	Verb	Adverb
Confederacy	Yes	No	No	No
Confederate States	Yes	No	No	No

As nouns, Confederacy and Confederate States are synonyms defined as:

Confederacy and Confederate States: the southern states that seceded from the United States in 1861

Other synonyms of Confederacy include Confederate States of America, Dixie, Dixieland, South.

Confederacy (noun)	Confederate States (noun)
the southern states that seceded from the United States in 1861	the southern states that seceded from the United States in 1861