Synonyms to infiltrator

buttinsky, Dutch uncle, Paul, Polonius, admonisher, adviser, backseat driver, butt-in, confidant, consultant, counsel, counselor, crasher, encroacher, expert, gate-crasher, guide, instructor, interloper, intermeddler, intruder, invader, kibitzer, meddler, mentor, monitor, nestor, nose, orienter, pragmatist, preceptist, prier, quidnunc, rubberneck, snoop, teacher, trespasser, unwelcome guest, gate crasher, arriviste, caller, company, emigrant, freeloader, frequenter, greenhorn, guest, habitue, immigrant, moocher, new arrival, new boy, newcomer, novus homo, parvenu, recruit, rookie, settler, squatter, stowaway, tenderfoot, uninvited guest, upstart, visitant, visitor, arrival, black sheep, blemish, burglar, busybody, comer, entrant, foreign body, foreign intruder, gatecrasher, impurity, in-migrant, incomer, misfit, monkey wrench, mote, ne