If you want to avoid using the word "tomorrow's" in your writing or speech, there are plenty of synonyms you can choose from. Some options include "the following day", "the next day", "the day after today", "the coming day", "the future day" or "the upcoming day". You could also use phrases like "in the near future" or "in the coming weeks". If you want to get creative, you could even use words like "morrow" or "on the morrow" to refer to the day following today. Whatever synonym you choose, make sure it fits the tone and style of your message and is easily understood by your audience.