catacomb 8 Associations

tunnel (generic term)

channel tunnel 14 Associations

chunnel Channel Tunnel railroad tunnel (generic term)

chunnel 7 Associations

Channel Tunnel railroad tunnel (generic term)

rabbit warren 13 Associations

warren burrow (generic term) tunnel (generic term)

railroad tunnel 15 Associations

tunnel (generic term)

subway 6 Associations

underpass tunnel (generic term)

underpass 9 Associations

subway tunnel (generic term)

warren 6 Associations

rabbit warren burrow (generic term) tunnel (generic term)