The rear delt raise is a popular exercise that targets the posterior deltoid muscles. However, there are many synonyms that can be used to refer to this exercise. Some of the most common synonyms include the reverse fly, posterior deltoid fly, bent-over lateral raise, bent-over reverse fly, and posterior deltoid raise. These names all refer to the same exercise, which involves standing bent over with arms hanging straight down, then lifting the arms out to the sides until they are parallel to the ground. The rear delt raise is an effective isolation exercise that helps to strengthen and tone the rear deltoid muscles, which are essential for good posture and shoulder stability.