Ad hocism refers to a process or practice that is done in an impromptu or ad hoc manner. It can be used to describe situations that are unplanned, unstructured, or temporary. There are several synonyms for ad hocism, including off-the-cuff, improvisation, patchwork, makeshift, provisional, and ad lib. These words reflect the informal and temporary nature of ad hocism. Other synonymous terms include make-do, stopgap, and expedient, all of which describe situations where something is done quickly and without much forethought. Ultimately, ad hocism and its synonyms are used to describe situations that are characterized by their lack of structure, organization, and planning.