Impasse

Noun

 * 1) a road with no exit; a cul-de-sac
 * 2) a deadlock or stalemate situation in which no progress can be made

Thesaurus
bar, barrier, blank wall, blind alley, blind gut, block, blockade, blockage, bottleneck, box, cecum, choking, choking off, clog, congestion, constipation, corner, costiveness, cul-de-sac, dead end, dead-end street, deadlock, dilemma, embolism, embolus, extremity, fix, gorge, halt, hole, impediment, infarct, infarction, jam, obstacle, obstipation, obstruction, pickle, plight, pocket, scrape, sealing off, stalemate, stand, stand-off, standstill, stop, stoppage, strangulation