When it comes to describing someone or something that is ostentatious, there are many synonyms that can be used. Some of the most common include flamboyant, showy, flashy, and extravagant. These words all convey the same basic idea of something that is meant to be noticed and admired, often in an over-the-top way. Other synonyms for ostentatious might include gaudy, pretentious, snobbish, or even vulgar - all of which suggest either a lack of taste or an attempt to impress through sheer excess. Whether you're trying to describe a person, an object, or an event, these synonyms can help you capture the essence of ostentation in all its various forms.