Synonyms and related words :
aeronautics, air lane, air route, air service, airway, astronautics, aviation, axis, ballooning, beeline, blind flying, chord, cloud-seeding, commercial aviation, contact flying, corridor, cruising, cut, cutoff, diagonal, diameter, direct line, directrix, edge, flight, flying, general aviation, gliding, great-circle course, lane, normal, path, perpendicular, pilotage, radius, radius vector, right line, sailing, sailplaning, secant, segment, shortcut, shortest way, side, soaring, straight, straight course, straight line, straight stretch, straightaway, streamline, tangent, transversal, vector, winging