intruder Synonyms

interloper trespasser party crasher filibusterer kibitzer crasher backseat driver arriviste nightrider visitor transgressor thief stranger stowaway squatter shedder raider gawker cat burglar new arrival snooper second-story man safebreaker penetrator out-of-stater outcomer odd one out infiltrator gatecrasher foreign body parvenue scandalmonger snoop buttinsky nosey-parker quidnunc prowler encroacher emigrant eavesdropper criminal busybody burglar bur botherer attacker assaulter assailer assailant alienism