The antonyms for the word "were casualty" include safe, secure, unharmed, protected, guarded, and sheltered. These terms describe a state of being free from harm or peril, unlike a casualty, which refers to someone who has been injured or killed in a war, accident, or other dangerous event. These antonyms are important words to know and use in situations where safety or security is a concern, such as in emergency preparedness or disaster response planning. By understanding and using these antonyms, we can communicate more clearly and effectively about the state of our safety and security.