"Fall asleep" is a commonly used phrase for the act of drifting into a state of unconsciousness. However, there are several synonyms that can be used instead of this phrase, such as doze off, drift off, nod off, slumber, snooze, and conk out. These words describe the gradual shutting down of the body and mind as one succumbs to a peaceful and relaxing state of sleep. Using these synonyms can help add variety and depth to your writing or conversation while still conveying the same meaning and allowing for a more nuanced expression of the experience of falling asleep.