Soporifically, meaning something that induces sleepiness or makes one feel drowsy, can be substituted by several different words. Some possible synonyms include somnolently, slumberously, lethargically, sleepily, narcotically, and sedatively. These words suggest a sense of calmness and relaxation, which may be desirable in certain situations, such as when settling down for the night or trying to calm down after a long day. Whether you are reading a bedtime story to your child or relaxing in a spa, there are many different ways to convey the feeling of soporifically using the right choice of words.