Metachronisms are anachronisms categorized by the incorrect use of time. These temporal abnormalities can occur in literature, films, music, or art. In some cases, they are intentional artistic choices, while in others, they are oversights or lack of knowledge. Synonyms for metachronisms can include chronological inconsistencies, temporal incongruities, historical anachronisms, anachronistic elements, and misplaced modernisms. It is essential to identify and avoid metachronisms as they can disrupt the semblance of the storyline and detract from its credibility. As such, it is essential to put in due diligence when creating fictional worlds or depicting historical events to prevent any metachronistic anomalies.