CAT, aerial, aerophysical, aerosphere, aerotechnical, air-conscious, air-minded, air-wise, air hole, air pocket, airsick, airspace, airworthy, aviational, bump, ceiling, crosswind, empty space, favorable wind, fog, front, head wind, high-pressure area, hole, ionosphere, jetstream, low-pressure area, overcast, pocket, roughness, soup, space, stratosphere, substratosphere, tail wind, tropopause, troposphere, trough, turbulence, visibility, visibility zero