Word

国境

国界、国堺
こっきょう、くにざかい、こっかい
national border; provincial border
Word

国外

こくがい
outside the country
Word

天国

てんごく
paradise; heaven; Kingdom of Heaven
Word

大韓民国

だいかんみんこく
Republic of Korea
Word

国防

こくぼう
national defence; national defense
Word

国連

こくれん
UN; United Nations
Word

公国

こうこく
dukedom; duchy; principality
Word

中華民国

ちゅうかみんこく
Republic of China (Taiwan)
Word

建国

けんこく
founding of a nation
Word

国語

こくご
national language; Japanese language (often as a school subject in Japan); native Japanese words (as opposed to loanwords)