Barnburner is a slang term for an exciting event or something that is impressive or exceptional. Some synonyms for the word barnburner include blockbuster, showstopper, sensation, sensation, extravaganza, tour de force, and masterpiece. Each of these words carries a slightly different connotation, but they all convey the same sense of being impressive, exciting, or memorable. Whether applied to a sports game, a concert, a movie, a speech, or any other event or performance, these words all connote something that is truly memorable and leaves a lasting impression on those who witness it.