interference - noun

a policy of intervening in the affairs of other countries

the act of hindering or obstructing or impeding

electrical or acoustic activity that can disturb communication

(American football) blocking a player's path with your body

any obstruction that impedes or is burdensome

interference - thesaurus

disturbance   encumbrance   hinderance   hindrance   hitch   incumbrance   intervention   noise   preventative   preventive