Crossword clues for the word: BOMBAST The word BOMBAST has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for BOMBAST Showing 1 to 8 of 8 results Clue(s) Gassy talk High-sounding words. Highfalutin talk Overblown speech Pompous language Pompous oratory Speech full of hot air Turgid language.