Antonyms for the word "called play" would include words like "serious work," "arduous task," "tedious labor," and "boring routine." When we use the phrase "called play," we typically refer to activities that are enjoyable, engaging, and provide a sense of freedom and creativity. In contrast, the antonyms suggest work that is difficult, monotonous, and lacks any fun or creativity. While both sets of words describe aspects of our everyday lives, the former represents the joys of childhood and free time, while the latter refers to the responsibilities and obligations of adulthood.