South vs Confederacy

South and Confederacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
South	Yes	No	No	No
Confederacy	Yes	No	No	No

As nouns, South and Confederacy are synonyms defined as:

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

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

South (noun)	Confederacy (noun)
the southern states that seceded from the United States in 1861	the southern states that seceded from the United States in 1861
the region of the United States lying to the south of the Mason-Dixon line