Expectorants are medications that help to thin and loosen mucus in the respiratory tract and make it easier to cough up. Synonyms for expectorants include mucolytics, cough medicines, bronchodilators, bronchial secretolytics, and respiratory stimulants. Mucolytics are medications that break up mucus, while cough medicines suppress cough. Bronchodilators are drugs that relax the muscles in the airways, making breathing easier. Bronchial secretolytics are drugs that help to bring up mucus from the airways. Respiratory stimulants are drugs that help to increase the activity of the respiratory system. These synonyms for expectorants are used interchangeably, depending on the specific needs of the patient and the severity of their respiratory illness.