THESAURUS
Misprize
be above, be contemptuous of, belittle, care nothing for, contemn, deprecate, depreciate, deride, despise, disdain, disparage, disprize, dump on, feel contempt for, feel superior to, hold beneath one, hold cheap, hold in contempt, insult, look down upon, make light of, make little of, make nothing of, minimize, misestimate, put down, rank low, ridicule, scorn, sell short, set at naught, set little by, shrug off, sneer at, sneeze at, sniff at, snort at, think little of, think nothing of, underestimate, underprize, underrate, underreckon, undervalue
ROGET THESAURUS
Misprize
Disrespect
VB
hold in disrespect, misprize, disregard, slight, trifle with, set at naught, pass by, push aside, overlook, turn one's back upon, laugh in one's sleeve, be disrespectful, be discourteous, treat with disrespect, set down, put down, browbeat, dishonor, desecrate, insult, affront, outrage, speak slightingly of, disparage, vilipend, vilify, call names, throw dirt, fling dirt, drag through the mud, point at, indulge in personalities, make mouths, make faces, bite the thumb, take by the beard, pluck by the beard, toss in a blanket, tar and feather, have in derision, hold in derision, deride, scoff, barrack, sneer, laugh at, snigger, ridicule, gibe, mock, jeer, hiss, hoot, taunt, twit, niggle, gleek, gird, flout, fleer, roast, turn into ridicule, burlesque, laugh to scorn, smoke, fool, make game of, make a fool of, make an April fool of, play a practical joke, lead one a dance, run the rig upon, have a fling at, scout, mob.
Underestimation
VB
underrate, underestimate, undervalue, underreckon, depreciate, disparage, not do justice to, misprize, disprize, ridicule, slight, neglect, slur over, make light of, make little of, make nothing of, make no account of, belittle, minimize, think nothing of, set no store by, set at naught, shake off as dewdrops from the lion's mane.