spellcheck: Somnambulist

somnambulism / somnambulist / somnambulistic / somnambulate / somnambulation / somnambular / somnambulant / somnambulance / somnambule

+ another old variant, somnambulator — The Weeping Somnambulator?

(I was introduced to the world of somnambu-words long ago when I encountered somnambulistic on the back of a '60s book of Edgar Allan Poe stories: tales whose titles, the blurb said, "sound a knell of somnambulistic doom.")