De Niro is a popular name that has gained global recognition through the legendary Hollywood actor, Robert De Niro. Hence, it is not surprising to find that there are limited or no synonyms for the word. However, some people might relate the name De Niro with the character he played in the movie "Taxi Driver," Travis Bickle. Therefore, Travis could be referred to as a synonym for De Niro. Moreover, Robert De Niro has portrayed several iconic roles such as Vito Corleone in "The Godfather Part II," Jimmy Conway in "Goodfellas," and Neil McCauley in "Heat." Hence, words or expressions related to his characters, such as Godfather, could also serve as synonyms for De Niro.