THESAURUS
Frustrate
annul, anticipate, arrest, baffle, balk, bar, beat, bilk, blast, block, brave, bring to nothing, buffalo, buffer, cancel, cancel out, cast down, challenge, check, checkmate, circumvent, come to nothing, confound, confront, conquer, contravene, counter, counteract, counterbalance, countermand, counterwork, cripple, cross, dash, deceive, defeat, defeat expectation, defy, destroy, disappoint, discomfit, disconcert, discountenance, discourage, dish, disillusion, disrupt, dissatisfy, elude, evade, exasperate, flummox, foil, forbid, forestall, get around, get round, give the runaround, give the slip, go one better, halt, hamper, hamstring, hinder, impede, inhibit, interrupt, invalidate, knock the chocks, let down, lick, negate, negativate, negative, neutralize, nonplus, nullify, obstruct, obviate, offset, outfigure, outflank, outgeneral, outguess, outmaneuver, outplay, outreach, outsmart, outwit, overcome, overreach, pass the buck, perplex, preclude, prevent, prohibit, redress, repel, repulse, ruin, sabotage, scotch, spike, spoil, stonewall, stop, stultify, stump, stymie, tantalize, tease, thwart, undo, upset, victimize, vitiate, void
ROGET THESAURUS
Frustrate
Hindrance
VB
hinder, impede, filibuster, impedite, embarrass, keep off, stave off, ward off, obviate, avert, antevert, turn aside, draw off, prevent, forefend, nip in the bud, retard, slacken, check, let, counteract, countercheck, preclude, debar, foreclose, estop, inhibit, shackle, restrict, obstruct, stop, stay, bar, bolt, lock, block, block up, choke off, belay, barricade, block the way, bar the way, stop the way, forelay, dam up, put on the brake, scotch the wheel, lock the wheel, put a spoke in the wheel, put a stop to, traverse, contravene, interrupt, intercept, oppose, hedge in, hedge round, cut off, inerclude, interpose, interfere, intermeddle, cramp, hamper, clog, clog the wheels, cumber, encumber, incumber, handicap, choke, saddle with, load with, overload, lay, lumber, trammel, tie one's hands, put to inconvenience, incommode, discommode, discompose, hustle, corner, drive into a corner, run foul of, fall foul of, cross the path of, break in upon, thwart, frustrate, disconcert, balk, foil, faze, feaze, feeze, baffle, snub, override, circumvent, defeat, spike guns, spoil, mar, clip the wings of, cripple, put an extinguisher on, damp, dishearten, discountenance, throw cold water on, spoil sport, lay a wet blanket, throw a wet blanket on, cut the ground from under one, take the wind out of one's sails, undermine, be in the way of, stand in the way of, act as a drag, hang like a millstone round one's neck.
Disappointment
VB
be disappointed, look blank, look blue, look aghast, stand aghast, find to one's cost, laugh on the wrong side of one's mouth, find one a false prophet, not realize one's hope, not realize one's expectation, disappoint, frustrate, discomfit, crush, defeat (failure), crush one's hope, dash one's hope, balk one's hope, disappoint one's hope, blight one's hope, falsify one's hope, defeat one's hope, discourage, balk, jilt, bilk, play one false, play a trick, dash the cup from the lips, tantalize, dumfound, dumbfound, dumbfounder, dumfounder (astonish).