There are several synonyms for the phrase "were ostentatious". One could use the terms grandiose, flamboyant, or showy to convey the same meaning. Alternatively, one could describe the behavior as extravagant or pretentious. These words all suggest that the individual in question is going out of their way to make a statement with their actions or possessions, and that this statement is perceived as being excessive or unnecessary by others. Whether in reference to a person's clothing, possessions, or conduct, the term "ostentatious" implies that their behavior is drawing unwanted attention and is perhaps even seen as vulgar or gauche.