Counter-weights are objects used to balance or offset the weight of other objects. Synonyms for counter-weights include ballast, counterpoise, balancing weight, stabilizer, and compensation weight. Ballast is a weight used to improve stability, often in ships or airplanes, while a counterpoise is used to offset the weight of another object. A balancing weight is used to achieve balance, and a stabilizer is used to prevent tipping or rocking. A compensation weight is used to adjust for imbalances or inconsistencies in an object's weight or distribution. Overall, these synonyms all refer to objects used to maintain stability, balance, and proper weight distribution.