Somniloquence :: Somniloquence (n.) The act of talking in one's sleep; somniloquism.
Somniloquism :: Somniloquism (n.) The act or habit of talking in one's sleep; somniloquy.
Somniloquy :: Somniloquy (n.) A talking in sleep; the talking of one in a state of somnipathy.