The phrase "art akin" refers to something that is similar or closely related to art. Some antonyms for this phrase could include terms such as unsophisticated, primitive, or crude. These words suggest a lack of artistic refinement, or a more basic and raw form of creation. Other antonyms might include terms such as banal, commonplace, or trite, which imply a lack of originality or creativity. Alternatively, one could use more extreme antonyms such as hideous, repulsive, or grotesque, which would suggest a complete departure from the concept of art and aesthetic beauty.