The term 'more serious' can be described by the crossword solutions acuter, GRAVER, WORSE, realer, and heavier. Acuter is an adjective meaning more sharp or intense, while GRAVER means more serious or solemn. WORSE is an adjective meaning of lower quality or WORSE condition. Realer is an adjective meaning more true or genuine, and heavier is an adjective meaning having greater weight or importance. Together, these words describe something that is more intense, serious, of lower quality, true, and important.