noctambulist
noun
noct·am·bu·list näk-ˈtam-byə-list 
: a person who walks while asleep : sleepwalker
Word History
Etymology
New Latin noctambulus "sleepwalker" (earlier noctambulō, with -ōn-, -ō, agent suffix, from Latin noct-, nox night entry 1 + -ambul-, noun derivative of ambulāre "to walk") + -ist entry 1 — more at amble entry 1
First Known Use
circa 1731, in the meaning defined above
noctambulist
noun
as in night rider
Synonyms & Similar Words
Relevance
- night rider
- sleepwalker
- nightclubber
- pub crawler
- night owl
- nightwalker
- nighthawk
Antonyms & Near Antonyms
- early bird