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underground entrance adit
chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids air-raid shelter , bombproof , bomb shelter
Islamic extremist group active since the late 1970s; seeks to overthrow the Egyptian government and replace it with an Islamic state; works in small underground cells al-Jihad , Egyptian Islamic Jihad , Islamic Jihad , Vanguards of Conquest
United States writer of humorous stylized stories about Broadway and the New York underground (1884-1946) Alfred Damon Runyon , Damon Runyon , Runyon
political underground movement apparat , apparatus
underground bed or layer yielding ground water for wells and springs etc aquifer
underground water aquifer , groundwater
water underground layer aquifer , groundwater
widely cultivated American plant cultivated in tropical and warm regions; showy yellow flowers on stalks that bend over to the soil so that seed pods ripen underground Arachis hypogaea , peanut , peanut vine
genus of plants with pods that ripen underground (see peanut) Arachis , genus Arachis
explosive mine hidden underground; explodes when stepped on or driven over booby trap , ground-emplaced mine , land mine
modified bud consisting of a thickened globular underground stem serving as a reproductive structure bulb
bulblike underground stem bulblet , corm
underground defensive position bunker
5,000 pound laser-guided bomb that can be programmed to penetrate to a given depth before exploding; used to penetrate hardened underground facilities Bunker Buster , GBU-28 , Guided Bomb Unit-28
burial chamber (usually underground) burial vault , vault
underground shelter built by an animal burrow
conceal underground bury
national park in New Mexico featuring what is probably the world's largest cavern with spectacular underground formations Carlsbad Caverns National Park
underground tunnel with recesses where bodies were buried (as in ancient Rome) catacomb
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