Not sleeping is a common issue that can lead to a range of problems including fatigue, lack of concentration, and poor mood. When describing this state, there are many synonyms that can be used to paint a more descriptive picture. These include phrases such as "wide-awake," "insomniac," "restless," "insomniatic," and "sleepless." Each of these descriptions can be used to convey a different feeling or intensity of not sleeping. Whether you're a night owl or someone who struggles to get to sleep, having a range of vocabulary to describe your sleep habits can help you articulate your experiences and find solutions for getting a better night's rest.