The opposite of the phrase "are casualty" would be a phrase that conveys safety or well-being. Some potential antonyms for "are casualty" could be "are unharmed," "are safe," "are secure," "are in good health," or "are thriving." Each of these phrases embodies the opposite meaning of "are casualty," which implies that someone has been injured or harmed in some way. While the word "casualty" often conjures up images of war or accidents, it can also refer to any situation where someone is harmed or suffers a loss. By using antonyms like those listed above, we can focus on positive and supportive language that emphasizes safety and well-being.