Rerunning is a term that means running something again or re-showing a program or an event that has already been aired. There are various synonyms for the word 'rerunning' such as replaying, reshowing, re-airing, re-broadcasting, re-playing, and redoing. These words can be used interchangeably depending upon the context of the sentence. For example, the TV channel is planning to rerun the most popular show of the year on Christmas Eve. Alternatively, it could be said that the network is going to replay the show on Christmas Eve, or they may re-air the show, or even rebroadcast the show on the same day. Utilizing these synonyms for rerunning the same show can help add variety to your writing and speaking.