noctambulation vs somnambulism

noctambulation and somnambulism both are nouns.

Word	Noun	Adjective	Verb	Adverb
noctambulation	Yes	No	No	No
somnambulism	Yes	No	No	No

As nouns, noctambulation and somnambulism are synonyms defined as:

Other synonyms of noctambulation include noctambulism, sleepwalking, somnambulation.

noctambulation (noun)	somnambulism (noun)
walking by a person who is asleep	walking by a person who is asleep