Ephemerals are temporary, transient, or short-lived things or organisms that do not last long. Synonyms for ephemerals include impermanent, transitory, fleeting, momentary, evanescent, short-lived, passing, and temporary. These words describe things that are not meant to last for a long time, or that are susceptible to becoming extinct or disappearing. Other synonyms for ephemerals include fleeting, brief, and short-term. Ephemerals can refer to various things like flowers, insects, seasons, or experiences. One common characteristic of ephemerals is the sense of transience, which creates a sense of urgency and importance to their existence, as they are seen as special because they are fleeting.