intruder Synonyms

trespasser interloper kibitzer crasher backseat driver noncitizen arriviste nightrider visitor party crasher transgressor thief stranger stowaway stalker squatter shedder raider filibusterer gawker peeping tom 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 cat burglar quidnunc prowler guest encroacher emigrant eavesdropper criminal challenger busybody burglar bur botherer