Catches off balance is a phrase that suggests catching someone by surprise or causing them to be caught off guard. Antonyms for this phrase would include words and phrases like prepared, aware, ready, composed, calm, poised, and collected. Other antonyms that could be used to describe the opposite of catching off balance might include words like predictable, familiar, routine, stable, secure, controlled, and reliable. When using antonyms to describe a situation where someone is not caught off balance, it is important to consider the context and tone of the situation to ensure that the appropriate language is used.