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ACROSS
1)  a knot with two loops and loose ends; used to tie shoelaces
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  a large quantity of written matter
4)  a long (usually round) rod of wood or metal or plastic


DOWN
1)  a reflex that expels gas noisily from the stomach through the mouth
2)  chocolate cookie with white cream filling
3)  a raised mark on the skin (as produced by the blow of a whip); characteristic of many allergic reactions
4)  a member of an indigenous nomadic people living in northern scandinavia and herding reindeer

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