The term 'full of hot air' is often used to describe someone who talks a lot but does not actually do anything. This phrase can be broken down into four words that all mean the same thing: BOASTFUL (8 letters), BLUSTERY (8 letters), GASSY (5 letters), and WINDY (5 letters). BOASTFUL means to talk in an exaggerated way about one's own accomplishments or abilities. BLUSTERY means to be loud and aggressive in speech or behavior. GASSY means to be full of empty, BOASTFUL words. Finally, WINDY means to be full of empty, BOASTFUL words. All of these words are used to describe someone who is full of hot air.