The term 'thick and sticky' can be summarized by two crossword solutions: VISCOUS (7 letters) and GOOEY (5 letters). VISCOUS is a term used to describe a liquid that has a high viscosity, meaning it is thick and resistant to flow. It is often used to describe liquids such as honey or syrup. GOOEY is a term used to describe something that is soft, sticky, and slimy. It is often used to describe substances such as melted cheese or marshmallow fluff.