Bibble-babble, also known as senseless talk or gibberish, can have a few different synonyms depending on the context. Some common alternatives include blabber, jabber, chatter, prattle, or ramble. These words all imply a sort of meaningless or excessive conversation, often without a clear purpose or direction. In other cases, babble might be used to describe a person who is speaking incoherently due to confusion or drunkenness, while similar words like drivel or nonsense might suggest a more intentionally absurd type of speech. Regardless of the specific synonym used, all of these words can help convey a sense of aimless or unclear communication.