When there is uncertainty looming in the air, we often use the phrase "just in case" to take precautions. However, there are several other synonyms for this phrase which can be used interchangeably. For instance, someone can say "as a precaution" or "as a safety measure" instead of "just in case." "In case of emergency" is another useful alternative as it conveys a clear sense of urgency yet maintains the same meaning. "For fear that" is another synonym for "just in case" and works best when expressing worry or concern. No matter which synonym you use, the important thing is to ensure that you are prepared for any eventualities that may arise.