Synonyms and related words :
air line, axis, beeline, chiasmal, chiasmic, chiastic, chord, crisscross, cross, crosscut, crossed, crossing, cut across, decussate, decussated, diagonal, diameter, direct line, directrix, edge, great-circle course, intersected, intersecting, normal, perpendicular, radius, radius vector, right line, segment, shortcut, side, straight, straight course, straight line, straight stretch, straightaway, streamline, tangent, transversal, vector