Recurring is a word that means something that happens repeatedly or occurs often. The antonyms for the word recurring are one-time, infrequent, sporadic, and irregular. A one-time event is something happening only once and never recurring again. Infrequent and sporadic means something happening occasionally or happening irregularly. Irregular means something that does not happen according to a fixed schedule, i.e., it is happening at random or unpredictable times. It's essential to have antonyms for every word to make your speech or writing more varied and interesting. A writer can use these antonyms for the word recurring to create a particular tone or atmosphere for their text.