The term 'Massive Land Mass' can be summarized by the crossword solution ASIA, which is a continent located in the eastern and northern hemispheres. It is the world's largest and most populous continent, covering an area of 17, 212, 000 square miles and containing over 4 billion people. ASIA is home to some of the world's oldest civilizations, including China, India, and Japan. It is also home to some of the world's most diverse cultures, languages, and religions.