1) Catch in a blunder 2) Catch in a contradiction 3) Catch in a lie 4) Cause to blunder 5) Cause to err 6) Cause to make a mistake 7) Foil 8) Make a mistake 
[v] - detect a blunder or misstep
verb cause to stumble; `The questions on the test tripped him up`stumble 1 misstep noun an unintentional but embarrassing blunder; `he recited the whole poem without a single trip`; `he arranged his robes to avoid a trip-up later`; `confusion caused his unfortunate misstep`