obstructor

1. Someone who systematically obstructs some action that others want to take (synset 110368974)
   is a type of: controversialist, disputant, eristic - a person who disputes; who is good at or enjoys controversy
   subtypes:

   • naysayer - someone with an aggressively negative attitude
   • stonewaller - one who stonewalls or refuses to answer or cooperate; someone who delays by lengthy speeches etc.
   same as: obstructer, obstructionist, resister, thwarter
2. Any structure that makes progress difficult (synset 103845513)
   is a type of: construction, structure - a thing constructed; a complex entity constructed of many parts
   subtypes:

   • bar - an obstruction (usually metal) placed at the top of a goal
   • barrier - a structure or object that impedes free movement
   • blockade - prevents access or progress
   • block, blockage, closure, occlusion, stop, stoppage - an obstruction in a pipe or tube
   • encumbrance, hinderance, hindrance, hitch, incumbrance, interference, preventative, preventive - any obstruction that impedes or is burdensome
   • obstacle - an obstruction that stands in the way (and must be removed or surmounted or circumvented)
   • tumbler - a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
   same as: impediment, impedimenta, obstructer, obstruction

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