Sofia's country is BULGARIA, an 8-letter word. BULGARIA is a country located in southeastern Europe, bordered by Romania to the north, Serbia and North Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. It is the 14th largest country in Europe and has a population of over 7 million people. BULGARIA is a member of the European Union and NATO. Its capital and largest city is Sofia, which is also the country's namesake.