Synonyms to gate crasher

arriviste, buttinsky, caller, company, crasher, emigrant, encroacher, freeloader, frequenter, greenhorn, guest, habitue, immigrant, infiltrator, interloper, intruder, invader, moocher, new arrival, new boy, newcomer, novus homo, parvenu, recruit, rookie, settler, squatter, stowaway, tenderfoot, trespasser, uninvited guest, unwelcome guest, upstart, visitant, visitor