Bringing legal action against someone is a serious matter, and there are two words that can be used to describe this process. The first is 'SUE, ' which is a three-letter word meaning to take a person or organization to court in order to seek compensation for a wrong done. The second is 'PROSECUTE, ' which is a nine-letter word meaning to bring criminal charges against someone. Both of these terms refer to the process of taking legal action against someone, and both can be used to seek justice in a court of law.