The term 'road incline' can be broken down into two crossword solutions: GRADE (5 letters) and HILL (4 letters). GRADE is a term used to describe the steepness of a road or path, usually expressed as a percentage. A HILL is an area of land that rises above the surrounding terrain, often with a distinct peak. Road inclines are typically found on hills, where the GRADE of the road increases in order to reach the peak.