The term COUNTRY HIDDEN IN 'ROMANIA' can be solved by the four-letter word OMAN. OMAN is an Arab country located in the southeastern corner of the Arabian Peninsula. It is bordered by the United Arab Emirates to the northwest, Saudi Arabia to the west, and Yemen to the southwest. OMAN has a long history and was once a powerful maritime empire. Today, it is a peaceful and prosperous nation with a strong economy based on oil and gas production.