Kwangju vs Gwangju

Kwangju and Gwangju both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kwangju	Yes	No	No	No
Gwangju	Yes	No	No	No

As nouns, Kwangju and Gwangju are synonyms defined as:

Kwangju and Gwangju: city in southwestern South Korea; an important military base during the Korean War

Kwangju (noun)	Gwangju (noun)
city in southwestern South Korea; an important military base during the Korean War	city in southwestern South Korea; an important military base during the Korean War