Dreadnoughts are large battleships that were built during the early 20th century. These massive ships were the epitome of military power and technological advancement. There are a few synonyms for the term dreadnought, such as battleship, super battleship, and warship. These terms are used to describe the massive and imposing nature of these ships, which had a significant impact on naval warfare during the First World War. The term dreadnought is also used metaphorically to describe anything that is large and powerful, such as "dreadnought-style" guitars, which are known for their powerful sound and imposing size.