The term 'physically sound' is a phrase used to describe someone who is in good physical health. The crossword solutions for this term are 'FIT' (3 letters) and 'HEALTHY' (7 letters). Both words refer to a person's physical condition, with 'FIT' referring to a person's physical strength and endurance, and 'HEALTHY' referring to a person's overall physical well-being. Together, these two words indicate that someone is in good physical condition and is able to perform physical activities without difficulty.