Sleep adverbs are provided in this article. The words listed here are commonly found along with the verb sleep in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb SLEEP.
actually, badly, barely, calmly, comfortably, deeply, directly, early
easily, finally, fitfully, fully, generally, happily, hardly, heavily
immediately, kindly, lightly, merely, normally, peacefully, poorly, possibly
probably, profoundly, properly, quickly, quietly, rarely, really, regularly
safely, scarcely, securely, separately, simply, softly, soundly, sweetly
tranquilly, usually
Hope this word list had the sleep adverb you were looking for. In addition to adverbs used with sleep, other example verb adverb pairings can be found on this site.
Snoringly
good
I was hoping to find a word that described doing something while sleep. I imagine it starts with “som-” (I mean a general term, not one for a specific activity like sleepwalking—that’d be “somnambulistically”.) Does a word like that exist?