Synonyms for Interference (same or very similar meaning)
WordNet sense 1 (electrical or acoustic activity that can disturb communication):
disturbance, noiseWordNet sense 2 (a policy of intervening in the affairs of other countries):
interventionWordNet sense 3 (any obstruction that impedes or is burdensome):
encumbrance, hindrance, hitch, preventative, preventive, incumbrance, hinderanceFrom the ODE community, based on WordNetadd/edit