Ostentate is a word that many people may not be familiar with, but it can be very useful when trying to describe someone who is showing off or being overly showy. There are many synonyms for ostentate that can be used to convey a similar meaning. Some common alternatives include flaunt, parade, display, exhibit, boast, and brag. These words all suggest a type of behavior where someone is putting something on display or making a show of their actions or possessions. Other synonyms for ostentate may include vaunt, trumpet, and tout, all of which can convey a sense of exaggerated self-importance or boastfulness. Overall, there are many options when it comes to finding the right word to describe someone who is ostentatious in their behavior.