The phrase "art in force" typically implies a strong presence of artistic expression, creativity, or beauty. Therefore, antonyms for this phrase would be words that are associated with a lack of artistry, aesthetics, or creativity. Words such as banality, mediocrity, dullness, drabness, and monotony could be considered antonyms for "art in force". These words are generally associated with a lack of imagination, originality, and ingenuity. Instead of invoking a sense of beauty and inspiration, these words suggest the absence of these qualities. Thus, these terms paint a picture of a world devoid of creativity and devoid of beauty.