Bronco-busters are individuals who break in and train horses, specifically wild or untrained ones. There are various synonyms for bronco-busters, including horse trainers, horse breakers, cowboy trainers, and horse tamers. A horse trainer is a person who teaches horses to obey commands and perform certain tasks, while a horse breaker typically works with unbroken or unruly horses and tames them. Cowboy trainers are similar to bronco-busters, and they also focus on breaking horses for riding and working purposes. Lastly, horse tamers are professionals who specialize in working with horses that have lost confidence in humans or are considered particularly challenging. All of these synonyms for bronco-busters denote individuals with the unique skill set required to work with horses.