jeer, mockery, flout, barrack, gibe, scoffery, counterscoff, derision, taunt, sneering, more...

believe, trust, credit

many, bitter, longer, silent, contemptuous, cruel, quaint, good, pure, little, open

laugh in disbelief,   laugh bitterly,   disbelieving laugh,   laugh of disbelief,   show derision,   say derisively,   laugh dismissively,   laugh scornfully,   look unimpressed,   show scorn