Step 1: Understand the meaning of the words. \begin{itemize} \item Empire: A large group of states or countries ruled over by a single authority. \item Umpire: A person who enforces the rules in a game or sport. \end{itemize}
Step 2: Use them in sentences. \begin{itemize} \item Sentence with Empire: ``The Roman Empire was one of the greatest civilizations in history.'' \item Sentence with Umpire: ``The umpire raised his finger to declare the batsman out.'' \end{itemize}
Step 3: Conclusion. The sentences clearly show that Empire refers to a vast political territory, while Umpire refers to a sports official.
Final Answer: \[ \boxed{\text{Empire = Political Territory, Umpire = Sports Official}} \]