Falling asleep is a natural process that occurs when the body and mind become relaxed. NAP, DROWSE, DROOP, NOD, DOZE, GONUMB, NODOFF, and DROPOFF are all terms used to describe the act of falling asleep. NAP is a three letter word meaning to take a short sleep, DROWSE is a six letter word meaning to be half asleep, DROOP is a five letter word meaning to become limp or DROOP, NOD is a three letter word meaning to lower the head briefly as if in sleep, DOZE is a four letter word meaning to sleep lightly, GONUMB is a six letter word meaning to become numb or drowsy, NODOFF is a six letter word meaning to fall asleep suddenly, and DROPOFF is a seven letter word meaning to fall asleep quickly.