Term: tunnel: a passageway through or under something, usually underground (especially one for trains or cars)
Broader: passageway: a passage between rooms or between buildings | Unrelated: second-degree burn: burn causing blisters on the skin and superficial destruction of the dermis
Broader: passageway: a passage between rooms or between buildings | Unrelated: alum: a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Broader: passageway: a passage between rooms or between buildings | Unrelated: purity: being undiluted or unmixed with extraneous material
Broader: passageway: a passage between rooms or between buildings | Unrelated: sand sole: a common flatfish of the Pacific coast of North America
Broader: passageway: a passage between rooms or between buildings | Unrelated: pederasty: sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner)
Broader: passageway: a passage between rooms or between buildings | Unrelated: hoopskirt: a skirt stiffened with hoops
Broader: passageway: a passage between rooms or between buildings | Unrelated: chronological age: age measured by the time (years and months) that something or someone has existed
Broader: passageway: a passage between rooms or between buildings | Unrelated: autograph album: an album for autographs
Broader: passageway: a passage between rooms or between buildings | Unrelated: limit: the greatest amount of something that is possible or allowed
Broader: passageway: a passage between rooms or between buildings | Unrelated: vanilla: any of numerous climbing plants of the genus Vanilla having fleshy leaves and clusters of large waxy highly fragrant white or green or topaz flowers