obstructionist

from WordNet (r) 3.0 (2006)
obstructionist
    n 1: someone who systematically obstructs some action that
         others want to take [syn: {obstructionist}, {obstructor},
         {obstructer}, {resister}, {thwarter}]
from The Collaborative International Dictionary of English v.0.48
Obstructionist \Ob*struc"tion*ist\, n.
   One who deliberately hinders progress; one who obstructs
   business, as in a legislative body. -- a. Of or pertaining to
   obstructionists; causing obstruction; as, obstructionist
   tactics. [Recent]
   [1913 Webster]
from Moby Thesaurus II by Grady Ward, 1.0
32 Moby Thesaurus words for "obstructionist":
      bitter-ender, brawler, defendant, diehard, disputant, dissentient,
      dissident, filibuster, filibusterer, frustrater, hinderer, impeder,
      intransigent, irreconcilable, last-ditcher, litigant, marplot,
      naysayer, negativist, noncooperator, objector, obstructer,
      obstructive, opposer, oppositionist, plaintiff, protester,
      quarreler, resister, scrapper, thwarter, wrangler
antiflux / dictionary / obstructionist
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