problemWhat's the problem here?
difficultyThe company is having some financial difficulties at the moment.
troubleWe've had a lot of trouble with the new computer system.
hitchinformalThe ceremony went without a hitch.
glitchWe've had a few technical glitches, but I'm confident we'll be ready on time.
hurdleGetting a work permit is only the first hurdle.
obstacleThere may be too many obstacles in the way of progress.
pitfallIt's just one of the pitfalls of buying a house.
snaginformalThe only snag is the cost.