The term "art adjunct of" suggests the idea of something being an extension or addition to art. Antonyms for this phrase could include words like "independent," "separate," "unrelated," or "dissociated." These words signify elements that stand alone and have no connection to art. For instance, a science project may be independent of any artistic influence or a political statement may be separate from any artistic expression. Dissociation from art could also manifest in the form of a lack of artistic merit or value. Therefore, antonyms for "art adjunct of" are terms that convey the idea of autonomy and independence from art.