sleep talking vs somniloquism

sleep talking and somniloquism both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleep talking	Yes	No	No	No
somniloquism	Yes	No	No	No

As nouns, sleep talking and somniloquism are synonyms defined as:

Other synonyms of sleep talking include somniloquy.

sleep talking (noun)	somniloquism (noun)
uttering speech while asleep	uttering speech while asleep