Synonyms and related words :
Dutch uncle, Paul, Polonius, admonisher, adviser, backseat driver, butt-in, confidant, consultant, counsel, counselor, crasher, encroacher, expert, gate-crasher, guide, infiltrator, instructor, interloper, intermeddler, intruder, invader, kibitzer, meddler, mentor, monitor, nestor, nose, orienter, pragmatist, preceptist, prier, quidnunc, rubberneck, snoop, teacher, trespasser, unwelcome guest,