廊下【ろうか】
corridor, hallway, passageway
画廊【がろう】
art gallery (esp. artworks for sale), picture gallery
回廊【かいろう】
corridor, gallery, hallway, cloister (i.e. covered walk typically circling a building or garden, esp. in a palace or place of worship)
渡り廊下【わたりろうか】
roofed corridor connecting two buildings, connecting passageway, skyway, skybridge, skywalk