PRC vs Red China

PRC and Red China both are nouns.

Word	Noun	Adjective	Verb	Adverb
PRC	Yes	No	No	No
Red China	Yes	No	No	No

As nouns, PRC and Red China are synonyms defined as:

PRC and Red China: a communist nation that covers a vast territory in eastern Asia; the most populous country in the world

Other synonyms of PRC include Cathay, China, Communist China, mainland China, People's Republic of China.

PRC (noun)	Red China (noun)
a communist nation that covers a vast territory in eastern Asia; the most populous country in the world	a communist nation that covers a vast territory in eastern Asia; the most populous country in the world