Synonyms and related words :
alight upon, be all thumbs, blunder, blunder away, blunder into, blunder on, boggle, botch, bumble, bump into, bungle, butcher, chance upon, come across, come on, come up against, come upon, commit a gaffe, discover serendipitously, encounter, fall in with, faux pas, flounder, fumble, happen upon, hit upon, light upon, lumber, mar, meet up with, meet with, miscue, muddle, muff, murder, play havoc with, run across, run into, run up against, slip, spoil, stumble, stumble on, stumble upon, trip, tumble on