Tossing and turning is a common symptom of INSOMNIA, which is an 8-letter word in this crossword. INSOMNIA is a sleep disorder characterized by difficulty falling asleep or staying asleep, resulting in inadequate sleep. AWAKE, a 5-letter word in this crossword, is the opposite of sleeping. FITFUL, a 6-letter word, describes sleep that is interrupted and restless. Wideawake, a 9-letter word, is an adjective used to describe someone who is not sleeping and is alert and active.