KIND OF PRESSURE is a broad term that can refer to four different types of pressure. Osmotic pressure, which is the pressure created by the movement of molecules through a semipermeable membrane, is seven letters long. PEER pressure, which is the influence of one's peers on their behavior, is four letters long. Barometric pressure, which is the atmospheric pressure of the air, is ten letters long. Lastly, SINUS pressure, which is the pressure in the cavities of the head, is five letters long.