The Collaborative International Dictionary of English v.0.48:

Passageway \Pas"sage*way`\, n.
   A way for passage; a hall. See Passage, 5.
   [1913 Webster]

WordNet (r) 3.0 (2006):

passageway
    n 1: a passage between rooms or between buildings
    2: a path or channel or duct through or along which something
       may pass; "the nasal passages" [syn: passage, passageway]

Moby Thesaurus II by Grady Ward, 1.0:

103 Moby Thesaurus words for "passageway":
   access, adit, air lock, aisle, alley, ambulatory, aperture,
   approach, arcade, areaway, artery, avenue, breezeway, broaching,
   cavity, channel, chasm, check, clearing, cleft, cloister,
   colonnade, communication, conduit, connection, corridor, couloir,
   course, covered way, crack, defile, disclosure, ditch, duct,
   egress, entrance, entranceway, entry, entryway, exit, fenestra,
   ferry, fistula, fontanel, foramen, ford, gallery, gangplank,
   gangway, gap, gape, gat, gulf, hall, hallway, hiatus, hole, hollow,
   in, ingress, inlet, intake, interchange, intersection, interval,
   junction, lacuna, lane, laying open, leak, loggia, means of access,
   opening, opening up, orifice, outlet, overpass, pass, passage,
   pergola, peristyle, pore, portico, railroad tunnel, slot, space,
   split, stoma, throwing open, traject, trajet, trench, trough,
   troughing, troughway, tunnel, uncorking, underpass, unstopping,
   vestibule, way, way in, yawn