stumbling-block, snag

OBSTACLE
WordClue
KNOThitch
LOAFblock of bread after baking
SNAGhitch
CATCHhitch
CHECKobstacle, interference
HITCHsnag
CANDLEsolid block of wax with embedded wick
BARRIERobstacle
CURTAINcloth used to block out light
HARDSHIPdifficulty, obstacle
HINDRANCEobstacle, impediment
DIFFICULTYobstacle, barrier
IMPEDIMENTobstacle, difficulty
SUSPENSIONinterruption, obstacle
LAPSEstumble, defect
SURPRISEstunner, bombshell