Sesquipedalianism is a word that describes the act of using long and convoluted words. While it may be fun to show off your vocabulary, it can also be frustrating to those who don't understand what you're saying. Luckily, there are many synonyms for sesquipedalianism that can help you express yourself without being too difficult to understand. Some synonyms include verbosity, grandiloquence, loquaciousness, prolixity, and garrulity. By using these words instead of sesquipedalianism, you can still convey that you enjoy using big words without potentially alienating your audience.