CAT aerospace aerosphere air current air hole air pocket airspace backing wind beam wind bucking bump ceiling challenge contention contradiction contraposition contravention contraversion counteraction counterbalance counterblast countercurrent counterforce counterinfluence counterpoise counterpressure counterweight counterworking crosscurrent crossing crosswind current current of air denial downdraft draft empty space fair wind fall wind favorable wind flow of air fog following wind foul wind front high-pressure area hole impugnation impugnment indraft inflow inhalation inrush inspiration ionosphere jetstream katabatic wind low-pressure area monsoon movement of air negation opposing opposition opposure oppugnation overcast pocket rebutment rebuttal refusal rejection relative wind resistance roughness slant of wind soup space standing against stratosphere stream stream of air substratosphere tail wind traversal tropopause troposphere trough turbulence undercurrent updraft veering wind visibility visibility zero wind