Spell Spelling

Saturday, June 14, 2008: "noze" and "nozy" for "nose" and "nosy" / "nosey"

The sibilant sound in today's twofer is Z (voiced), not S (unvoiced). So why is it spelled with an S?: "noze" and "nozy".
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My thanks to "Unicycle..." for today's twofer, with thanks also to "yao..." for pointing out the variant spelling "nosey".