THESAURUS
dumbfound
amaze, astonish, astound, awe, awestrike, bedaze, bedazzle, bewilder, boggle, bowl down, bowl over, choke, choke off, confound, confuse, daze, dazzle, dumbfounder, flabbergast, floor, gag, hush, hush-hush, muffle, muzzle, nonplus, overwhelm, paralyze, perplex, petrify, put to silence, quiet, quieten, shock, shush, shut down on, silence, soft-pedal, squash, squelch, stagger, startle, stifle, still, strike dead, strike dumb, strike with wonder, stun, stupefy, surprise, throttle
ROGET THESAURUS
dumbfound
Inexpectation
VB
not expect, be taken by surprise, start, miscalculate, not bargain for, come upon, fall upon, be unexpected, come unawares, turn up, pop, drop from the clouds, come upon one, burst upon one, flash upon one, bounce upon one, steal upon one, creep upon one, come like a thunder clap, burst like a thunderclap, thunder bolt, take by surprise, catch by surprise, catch unawares, catch napping, yach, pounce upon, spring a mine upon, surprise, startle, take aback, electrify, stun, stagger, take away one's breath, throw off one's guard, astonish,
dumbfound.
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).