Lallation refers to the babbling or stuttering speech of young children who are still learning to speak. Some synonyms for lallation include baby talk, gibberish, prattle, babble, and incoherent speech. These terms all refer to speech that is unclear or unintelligible, and is often associated with young children or people who are struggling to communicate. Lallation can also be used to describe a speech impediment or disorder, such as stuttering or lisping. Overall, synonyms for lallation relate to speech that is imperfect or difficult to understand, and are commonly used to describe communication difficulties among young children or people with speech disorders.