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
hindrance, prevention, preclusion, obstruction, stoppage, embolus, embolism, infarct, interruption, interception, interclusion, hindrance, impedition, retardment, retardation, embarrassment, oppilation, coarctation, stricture, restriction, restraint, inhibition, blockade, interference, interposition, obtrusion, discouragement, discountenance, impediment, let, obstacle, obstruction, knot, knag, check, hitch, contretemps, screw loose, grit in the oil, bar, stile, barrier, turnstile, turnpike, gate, portcullis, beaver dam, trocha, barricade, wall, dead wall, sea wall, levee breakwater, groyne, bulkhead, block, buffer, stopper, boom, dam, weir, burrock, drawback, objection, stumbling-block, stumbling-stone, lion in the path, snag, snags and sawyers, encumbrance, incumbrance, clog, skid, shoe, spoke, drag, drag chain, drag weight, stay, stop, preventive, prophylactic, load, burden, fardel, onus, millstone round one's neck, impedimenta, dead weight, lumber, pack, nightmare, Ephialtes, incubus, old man of the sea, remora, difficulty, insuperable, obstacle, estoppel, ill wind, head wind
, trammel, tether, hold back, counterpoise, damper, wet blanket, hinderer, marplot, killjoy, party pooper, party crasher, interloper, trail of a red herring, opponent, hindering, obstructive, obstruent, impeditive, impedient, intercipient, prophylactic, impedimentary, in the way of, unfavorable, onerous, burdensome, cumbrous, cumbersome, obtrusive, hindered, windbound, waterlogged, heavy laden, hard pressed, unassisted &c (assist), single-handed, alone, deserted, occurrent nubes.
opposition, antagonism, oppugnancy, oppugnation, impugnation, contrariety, contravention, counteraction, counterplot, cross fire, undercurrent, head wind
, clashing, collision, conflict, competition, two of a trade, rivalry, emulation, race, absence of aid, resistance, restraint, hindrance, opposing, opposed, adverse, antagonistic, contrary, at variance, at issue, at war with, unfavorable, unfriendly, hostile, inimical, cross, unpropitious, in hostile array, front to front, with crossed bayonets, at daggers drawn, up in arms, resistant, competitive, emulous, against, versus, counter to, in conflict with, at cross purposes, against the grain, against the current, against the stream, against the wind, against the tide, with a headwind, with the wind ahead, with the wind in one's teeth, in spite, in despite, in defiance, in the way, in the teeth of, in the face of, across, athwart, overthwart, where the shoe pinches, in spite of one's teeth, though, even, quand meme, per contra, nitor in adversum.