There are several synonyms for the word "unconscious". These include words like "unaware", "insensible", "senseless", "fainting", and "in a coma". Each of these words can be used to describe a lack of consciousness, whether it be temporary or permanent. Some of these words also imply different levels of severity. For example, "fainting" is typically a brief loss of consciousness whereas being "in a coma" usually suggests a more serious and long-term condition. Regardless of the synonym used, it is important to seek medical attention if someone is unconscious, as this may be indicative of a serious health issue.