Bloviating is a word often used to describe someone who talks excessively and self-importantly without saying anything of substance. There are several synonyms for this word that can be used to convey the same meaning, but with different nuances. Some of the best synonyms for bloviating include pontificating, blustering, spouting, blabbering, and babbling. These words all have a negative connotation, implying that the speaker is more interested in hearing themselves speak than actually communicating with their audience. Whether in politics, business, or personal relationships, a bloviator is someone who is difficult to engage with and may be best avoided.