Flight features are important components of aircrafts that allow passengers to board and disembark safely. STAIRS (6 letters) are a set of steps that lead up or down, usually connecting two levels of a building or aircraft. Steps (5 letters) are individual pieces of a staircase, which are connected to form a complete structure. Risers (6 letters) are the vertical parts of a step that separate each step from the next. Together, these three components make up the flight features of an aircraft.