The antonyms for the word "out paced" include "lagged behind," "fell behind," "trailed," and "lagged." These words describe the opposite of out pacing, which means to move or progress faster than someone or something else. When someone is lagging behind, they are struggling to keep up, and they are not moving as quickly as others. Similarly, if someone falls behind, they have lost momentum and are no longer keeping up with the pace. Therefore, the antonyms for out paced describe slower movements, and they signify that someone or something is not up to speed with others.