hostility — a hostile state, condition, or attitude; enmity; antagonism; unfriendliness.
management — the act or manner of managing; handling, direction, or control.
separation — an act or instance of separating or the state of being separated.
blockage — A blockage in a pipe, tube, or tunnel is an object which blocks it, or the state of being blocked.
delay — If you delay doing something, you do not do it immediately or at the planned or expected time, but you leave it until later.
handicap — a race or other contest in which certain disadvantages or advantages of weight, distance, time, etc., are placed upon competitors to equalize their chances of winning.
obstruction — something that obstructs, blocks, or closes up with an obstacle or obstacles; obstacle or hindrance: obstructions to navigation.
prevention — the act of preventing; effectual hindrance.
stoppage — an act or instance of stopping; cessation of activity: the stoppage of all work at the factory.