Norco is a brand name of a narcotic pain medication that contains both hydrocodone and acetaminophen. As a brand name, Norco is unique and can not be replaced with equivalents. However, it is possible to find synonyms for the individual components of the drug. Hydrocodone belongs to a class of drugs called opioids which include morphine, codeine, and oxycodone. Similarly, acetaminophen is a type of pain reliever that can be found in other medications such as Tylenol. If you were searching for synonyms for Norco for medical purposes, brand names are not interchangeable, and alternative medications should not be taken without consulting a healthcare professional first.