Gulf Nation is a term used to refer to countries located in the Persian Gulf region. These countries include IRAN (4 letters), OMAN (4 letters) and Yemen (5 letters). All three of these countries are located on the Arabian Peninsula and have coastlines along the Persian Gulf. IRAN is bordered by Iraq, Turkey, Armenia, Azerbaijan, Turkmenistan, Afghanistan and Pakistan. OMAN is bordered by Saudi Arabia and the United Arab Emirates. Yemen is bordered by Saudi Arabia and OMAN.