Throwing someone in a dungeon has been a punishment used throughout history, usually reserved for those who have committed serious crimes. However, there are several synonyms one can use instead of the phrase "threw dungeon." These synonyms include incarcerated, imprisoned, jailed, detained, lock up, put away, confined, and caged. Each one of these synonyms articulates the idea of being confined against one's will, with the possible connotations of punishment and loss of freedom. It's essential to choose the right synonym depending on your context and audience, as some terms might be better suited for more formal writing, while others might be too informal.