Bluster and bluff are two words that are often used interchangeably, but they actually have slightly different meanings. Bluster refers to loud and aggressive talk or behavior that is meant to intimidate or impress others. Bluff, on the other hand, refers to a deliberate attempt to deceive or mislead someone through words or actions. Some synonyms for bluster include boast, brag, swagger, and bluster. Synonyms for bluff include deception, trickery, fraud, and chicanery. Both words can be used in a variety of contexts, but it is important to use them correctly to avoid confusion or miscommunication.