The term "is casualty" refers to an individual who has been injured or killed in an accident, disaster, or war. Its antonyms include words that describe being safe, sound, or alive. Some examples of antonyms for "is casualty" include: survivor, healthy, unharmed, unscathed, invulnerable, strong, protected, secure, and whole. These words are often used to convey a sense of hope, relief, or gratitude, and can be particularly relevant in contexts where people are dealing with traumatic experiences or loss. In healthcare, the concept of avoiding or minimizing casualties is a key consideration in emergency planning and disaster relief efforts.