Shake-downing refers to the act of searching or extorting someone for money or valuables. Some synonyms for shake-downing include blackmailing, coercing, extorting, intimidating, pressuring, and squeezing. These terms all involve the use of force or threats to obtain something from another person. Other related synonyms include hustling, scamming, and fleecing, which involve fraudulent or deceitful practices to obtain money or valuables. It is important to note that shake-downing and its synonyms are illegal and unethical behaviors that should not be practiced. If you or someone you know is a victim of shake-downing, it is essential to seek help from law enforcement immediately.