impediment

[1]	bar , hindrance , hinderance , barrier , obstruction , deterrent , balk , block , check , baulk , check , hindrance , encumbrance , handicap , restraint , hold-up , hitch , snag , restriction , stricture , bottleneck , delay , hang-up , inhibition , curb
[2]	obstruction , obstructor , obstructer , impedimenta