The phrase "all day night" can be described by a variety of synonyms. Some of these synonyms include "around the clock," "24/7," "day and night," "continuously," "non-stop," and "uninterruptedly." These words all communicate the idea of an ongoing and perpetual activity, emphasizing the persistence and intensity of the action. Whether used to describe a busy work schedule or an insomniac's lack of sleep, these synonyms convey a sense of perpetual motion and dynamic energy. So, if you're looking to inject a little extra vigor into your language, consider swapping out "all day night" for one of these powerful synonyms.