No. Slovakia and Romania do not share a border.
Romania has no border with Russia.
Every country in the world except Romania, Turkey, Greece, Macedonia and Serbia, does not border Bulgaria.
Romania and Ukraine.
Austria, Greece, Albania haven't a boundary with Romania.
Russia and Romania don't share a border. Ukraine borders both countries, the only country to do so. Romania is to the southwest of Russia.
Romania
No. Antarctica is a continent, and is not a country with which another country could share a border.
Both Serbia and Ukraine border Hungary and Romania.
mongolia
Ukraine
Romania.