Impendency is a formal word that refers to something that is about to happen or is imminent. There are many synonyms to this word that can be used interchangeably depending on the context. For instance, words like impending, forthcoming, looming, and imminent are some of the most common synonyms used for impendency. Other synonyms to consider include on the horizon, in the offing, and approaching. When describing an imminent event, one may also use words such as impending, inevitable, or inevitable. In summary, these synonyms all refer to the same meaning of something in the future that is likely to happen soon.