The term 'SPREADS THICKLY' can be summed up by the crossword solution 'SLATHERS, ' which is an 8-letter word. Slathering is a cooking technique in which a thick layer of a condiment or sauce is spread over food. It is often used to add flavor and texture to dishes, such as when butter is slathered over toast or when a sauce is slathered over a piece of meat. Slathering is also used to help keep food moist during cooking.