White knucklers are a commonly used term for actions that induce fear, anxiety, or panic by placing people in dangerous or uncertain situations. Depending on the context, white knucklers can be replaced with more specific synonyms. Some possible synonyms include nail-biters, heart-stoppers, tension-inducers, adrenaline-pumpers, or hair-raisers. Whether you're watching a thrilling movie, riding a rollercoaster, or facing a challenging task, these synonyms can help you describe the experience of white knucklers. So, the next time you find yourself experiencing an intense rush of emotions, consider using one of these synonyms to better describe the moment for others.