Below are possible answers for the crossword clue Underground passage.
5 letter answer(s) to underground passage
SEWER
a waste pipe that carries away sewage or surface water
misfortune resulting in lost effort or money; "his career was in the gutter"; "all that work went down the sewer"; "pensions are in the toilet"
someone who sews; "a sewer of fine gowns"
6 letter answer(s) to underground passage
SUBWAY
an electric railway operating below the surface of the ground (usually in a city); "in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"
an underground tunnel or passage enabling pedestrians to cross a road or railway
TUNNEL
a hole made by an animal, usually for shelter
a passageway through or under something, usually underground (especially one for trains or cars); "the tunnel reduced congestion at that intersection"
force a way through
move through by or as by digging; "burrow through the forest"
Other crossword clues with similar answers to 'Underground passage'