The antonyms for the word "am sore" are varied and depend on the context. One possible antonym is "am relieved," indicating a cessation of pain or discomfort. Another option could be "am comfortable," indicating a lack of physical or emotional strain. In a fitness context, an antonym might be "am strong," indicating an improvement in physical fitness or the ability to endure physical strain without feeling sore. Overall, the antonyms for "am sore" usually express a positive physical or emotional state and an absence of discomfort.