Mental exercise is the activity that stimulates the brain to enhance cognitive function, creativity, and memory. It is an excellent way to keep your mind active and maintain mental agility. Some of the synonyms for mental exercise include brain workout, mental agility, cognitive exercise, neurobic exercise, brain training, and mental challenge. These are all designed to engage the brain in various activities that keep the brain active and alert. Other synonyms for mental exercise include mental stimulation, cognitive stimulation, brain exercise, and brain stimulation. Whatever the terminology used, the aim is to keep your mind active and engaged in activities that challenge and stimulate your brain.