interloper Synonyms

intruder trespasser itinerant person crasher persona non grata backseat driver noncitizen arriviste nightrider visitor unknown trespassing thruster stranger squatter drifter kibitzer unwanted visitor intruders party crasher floaters new arrival snooper penetrator odd one out infiltrator gatecrasher foreign body buttinsky nosey-parker gawker refugee quidnunc pusher incomer immigrant guest encroacher emigrant discloser challenger busybody burglar boarder alienism alienage alien infringer interferer intermeddler