The term 'Mountain Kingdom' can be summarized by the crossword solution of Nepal, which is a 5-letter word. Nepal is a small landlocked country located in South Asia, bordered by India and China. It is home to 8 of the world's 10 highest mountains, including Mount Everest, and is known for its majestic Himalayan mountain range. Nepal is a constitutional monarchy, with a Hindu majority and a Buddhist minority. The country is renowned for its diverse culture, with many ethnic groups and languages.