Talking foolishly is a common phrase used to describe someone who speaks without thinking or in an incoherent manner. Babbling, prating, havering, blithering, maundering, blabbing, prattling, blathering, yapping, drooling, and nattering are all words that can be used to describe this type of behavior. Each of these words has a different number of letters, ranging from three to seven, and can be used as solutions to the crossword puzzle term 'talk foolishly'.