blunder

ˈblʌndə

noun

a stupid or careless mistake.

she stopped, finally aware of the terrible blunder she had made

mistake,error,gaffe,fault,slip,oversight,inaccuracy,botch,debacle,fiasco,faux pas,slip-up,boo-boo,howler,foul-up,fail,boob,clanger,blooper,bloomer,fuck-up

verb

make a stupid or careless mistake; act or speak clumsily.

he knew he’d blundered

make a mistake,be mistaken,err,be in error,misjudge,miscalculate,bungle,trip up,be wrong,get something wrong,be wide of the mark,slip up,screw up,blow it,foul up,goof,put one’s foot in it,make a boo-boo,fuck up,bugger up,drop a brick,boob