i Register
In some senses, bombastic is marked as archaic. Watch for register when choosing this word.
adj
showy in speech and given to using flowery or elaborate terms; grandiloquent; pompous
Dorsett came up the stairs, buggy whip in hand. He bustled into the office in his usual self-important way. Frank noticed that the old clerk sat down on him promptly. He was not one bit impressed with the bombastic visitor from Greenville.
High-sounding but with little meaning.
Inflated, overfilled.