There are countless ways to describe the act of falling asleep. Some common synonyms for "went to sleep" include dozed off, snoozed, drifted off, nodded off, slumbered, drowsed, slept, and went under. With every creative description, the nuances of the experience can be better captured, such as "dropped off" to suggest suddenness, or "slept off" to imply that sleep was needed to relieve ill effects. Depending on context, some of these terms may be more appropriate than others. For instance, "slumber" might be more fitting for poetic writing, while "dozed off" might be more appropriate for casual conversation. Whatever the situation, there's always a synonym to more accurately capture the experience of slipping away into sleep.