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ACROSS
1)  rotary motion of an object around its own axis
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)  the upper part of the human body or the front part of the body in animals; contains the face and brains
4)  reflecting optimism


DOWN
1)  a tributary of the rhine
2)  chocolate cookie with white cream filling
3)  a unit of length of thread or yarn
4)  a polite name for any woman

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roll
urea
head
rosy