The term 'talk incoherently' can be described by four different crossword solutions: BABBLE (6 letters), RAMBLE (6 letters), SPUTTER (7 letters), and RAVE (4 letters). Babbling is a type of speech characterized by rapid, random, and often nonsensical words or sounds. Rambling is a type of speech that is long-winded and disorganized, often jumping from one topic to another. Sputtering is a type of speech that is characterized by stammering, stuttering, or repeating words or phrases. Raving is a type of speech that is wild and uncontrolled, often involving shouting or screaming. All four of these terms describe talking incoherently in some way.