The term 'MORE SOUND' can be broken down into three crossword solutions: WISER (5 letters), SANER (5 letters), and HALER (5 letters). WISER is an adjective that means having or showing experience, knowledge, and good judgment. SANER is an adjective that means having or showing sound judgment; not foolish or reckless. HALER is an adjective that means healthier or more robust. Together, these three words describe someone who is WISER, saner, and healthier, which is the definition of the term 'MORE SOUND'.