Synonyms and related words :
all fours, crawl, crawling, creep, creeping, gumshoeing, night-wandering, noctambulation, noctambulism, noctivagant, noctivagation, padding, prowling, pussyfooting, scrabble, scramble, sidling, sleepwalk, sleepwalking, slinking, snaking, sneaking, somnambulant, somnambular, somnambulism, stealing, tippytoe, tiptoe, tiptoeing, worming