The term "barbituric" refers to a class of drugs that act as a central nervous system depressant. There are several other words that are used synonymously with "barbituric," including "barbiturate," "sedative-hypnotic," and "tranquilizer." Each of these terms refers to a type of drug that can have a calming or relaxing effect on the body and mind. Despite their potential benefits, these drugs can also be highly addictive and dangerous if misused. As such, it is important to only use these types of medications under the guidance of a medical professional and to carefully follow dosage instructions.