Obstructer

n.

1.

One who obstructs or hinders.

Noun	1.	obstructer - someone who systematically obstructs some action that others want to take Synonyms: obstructionist, obstructor, resister, thwarter
	2.	obstructer - any structure that makes progress difficult Synonyms: impedimenta, obstruction, obstructor, impediment

block, blockade, controversialist, disputant, embarrass, eristic, hinder, naysayer, obstruct, obstructionist, obstructor, resister, stonewaller, stymie, stymy, thwarter