Confederacy vs South

Confederacy and South both are nouns.

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

As nouns, Confederacy and South are synonyms defined as:

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

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

Confederacy (noun)	South (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