The term 'boarding spot' can be broken down into two crossword solutions: SLOPE (5 letters) and DEPOT (5 letters). A SLOPE is a surface that is inclined at an angle, usually from the horizontal. It can refer to a hill or mountain side, or a ramp used for boarding a vehicle. A DEPOT is a place where vehicles are stored or maintained, or a station where passengers can board a train or bus. In this context, a boarding spot could refer to either a SLOPE or a DEPOT, depending on the type of vehicle being boarded.