Collocations for obstruction - noun

physical
unlawful, wilful (both BrE,law)
bureaucratic
The asylum seekers had to contend with continued bureaucratic obstruction.

cause, create
The car had been parked in front of the entrance, causing an obstruction.

clear, remove
She had to have surgery to remove an obstruction from her throat.

obstruction of justice (law)
She was charged with obstruction of justice.