triumphal arch(n = noun.artifact) - a monumental archway; usually they are built to commemorate some notable victory;
is a kind of arch, memorial, monument

N  trophy, medal, prize, palm, award, laurel, laurels, bays, crown, chaplet, wreath, civic crown, insignia, feather in one's cap, decoration, garland, triumphal arch, Victoria Cross, Iron Cross, triumph, flying colors, monumentum aere perennius, for valor.

N  celebration, solemnization, jubilee, commemoration, ovation, paean, triumph, jubilation, ceremony (rite), holiday, fiesta, zarabanda, revelry, feast (amusement), china anniversary, diamond anniversary, golden anniversary, silver anniversary, tin anniversary, china jubilee, diamond jubilee, golden jubilee, silver jubilee, tin jubilee, china wedding, diamond wedding, golden wedding, silver wedding, tin wedding, triumphal arch, bonfire, salute, salvo, salvo of artillery, feu de joie, flourish of trumpets, fanfare, colors flying, illuminations, inauguration, installation, presentation, coronation, Lord Mayor's show, harvest-home, red-letter day, trophy, Te Deum, fete, holiday, Forefathers' Day, celebrating, commemorative, celebrated, immortal, in honor of, in commemoration of, Int, hail!, all hail!, io paean, io triumphe!, see the conquering hero comes!.

abutment arch, alveolar arch, aortic arch, arch, arch brick, arch over, arch stone, arch support, basket-handle arch, bell arch, branchial arch, broken arch, camber arch, corbel arch, diminished arch, drop arch, fallen arch, flat arch, four-centered arch, gill arch, gothic arch, haemal arch, hemal arch, horseshoe arch, in an arch manner, keel arch, lancet arch, maya arch, mayan arch, metatarsal arch, moorish arch, neural arch, ogee arch, pectoral arch, pelvic arch, pier arch, pointed arch, proscenium arch, rampant arch, roman arch, round arch, rowlock arch, safety arch, scheme arch, scoinson arch, sconcheon arch, segmental arch, semicircular arch, shouldered arch, skeen arch, skene arch, skew arch, steel arch bridge, straight arch, sunken arch, superciliary arch, three-centered arch, trefoil arch, trimmer arch, triumphal, trumpet arch, tudor arch, vertebral arch, zygomatic arch