sleepwalking vs somnambulation

sleepwalking and somnambulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleepwalking	Yes	No	No	No
somnambulation	Yes	No	No	No

As nouns, sleepwalking and somnambulation are synonyms defined as:

Other synonyms of sleepwalking include noctambulation, noctambulism, somnambulism.

sleepwalking (noun)	somnambulation (noun)
walking by a person who is asleep	walking by a person who is asleep