The word "completed" can be replaced with some other synonyms to convey the same meaning. One of them is "finished," which means to have come to an end and reached a conclusion. Another synonym is "concluded," which suggests that the action or task has reached its final phase. "Accomplished" is another word that means to have fulfilled a purpose or achieved a goal. "Executed" is also a synonym for "completed," indicating that a specific task has been accomplished with precision and care. Lastly, "terminated" means to have ended something, which is often used in a legal or contractual context. Using these synonyms can help in diversifying your vocabulary and adding variety to your language.