"Foot-sore" refers to the condition whereby someone feels pain, discomfort or fatigue in their feet, often due to walking long distances or standing for extended periods. There is a range of synonyms that can be used to describe this condition, such as aching feet, tired feet, sore feet, or weary feet. Other alternatives include tender feet, painful feet, throbbing feet or worn-out feet. Other expressions that could be used to describe this uncomfortable sensation could include sore legs, swollen feet, blistered toes, or exhausted limbs. Regardless of the particular word choice, the underlying message will be clear: the person in question is experiencing discomfort, and their feet need a break.