The term 'fizzle out' can be broken down into five words: Peter (5 letters), POOP (4 letters), END (3 letters), DIE (3 letters), and Fallflat (8 letters). Peter is a common name, and it could refer to the person who is fizzling out. POOP is a slang term for excrement, which could symbolize the idea of something being worthless or insignificant. END is a synonym for conclusion, which could represent the END of something. DIE is another word for death, which could indicate the END of something. Finally, Fallflat is an idiom meaning to fail or to not be successful, which could be used to describe the idea of fizzling out. All together, these words could be used to describe the idea of someone or something failing or coming to an END.