"James Riddle Hoffa" is a name that is often synonymous with the American labor movement in the 20th century. Hoffa was the leader of the International Brotherhood of Teamsters, one of the largest and most powerful unions in the US. He was known for his tough negotiating tactics and his close relationships with organized crime figures. Some synonyms for Hoffa could be "labor leader," "union boss," "Teamsters chief," or simply "Hoffa." Despite his disappearance in 1975, the name "James Riddle Hoffa" continues to be a significant part of American history and culture, appearing in numerous books, movies, and other media.