Yangon, Rangoon(noun)

the capital and largest city of Myanmar; located in the south near the Irrawaddy river delta

Rangoon(ProperNoun)

The former and still widely used spelling of the largest city and former capital of Myanmar (Burma). The spelling Yangon is preferred by the Burmese and has also become widely accepted. The administrative capital has been moved to Naypyidaw or Nay Pyi Taw.

Rangoon

capital and chief port of British Burmah, situated 20 m. inland from the Gulf of Martaban, on the Hlaing or Rangoon River, the eastmost of the delta streams of the Irrawaddy; British since 1852; a well-appointed city of modern appearance, strongly fortified; contains the famous Shway-Dagon pagoda erected in the 6th century B.C.; has extensive docks, and negotiates the vast bulk of Burmese exports and imports; the former include teak, gums, spices, and rice.