obstructor

Nouns

(n) someone who systematically obstructs some action that others want to take obstructer, obstructionist, resister, thwarter,
(n) any structure that makes progress difficult impedimenta, obstruction, impediment, obstructer,

Synonyms

obstructer obstructionist resister thwarter impedimenta obstruction impediment

Words of close approximity

obstructed obstructer