arrival, arriviste, black sheep, blemish, burglar, busybody, buttinsky, comer, crasher, emigrant, encroacher, entrant, foreign body, foreign intruder, gate-crasher, gatecrasher, greenhorn, immigrant, impurity, in-migrant, incomer, infiltrator, interloper, invader, kibitzer, meddler, misfit, monkey wrench, mote, new arrival, new boy, newcomer, novus homo, oddball, parvenu, recruit, rookie, settler, sliver, snooper, speck, splinter, squatter, stone, stowaway, tenderfoot, thief, trespasser, uninvited guest, unwelcome guest, upstart, visitant, visitor, weed