Synonyms of obstructions

1 Syllable
block, jam, lock, stop, check, snag, bar, wall
2 Syllables
barrier, trouble, mountain, restraint, hamper, roadblock, hurdle, gridlock, trammel, blocking
3 Syllables
blockage, stoppage, checkmate, hindrance
4 Syllables
circumvention, barricade, difficulty
5 Syllables
interference