as ... as a ...
as sick / tired as a dog
as ... as a ...
as busy as a bee
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as dry as a bone
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as mad as a hatter
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as deaf as a post
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as flat as a pancake
as... as a ...
as cool as a cucumber
as ... as a ...
as proud as a peacock
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as light as a feather
as ... as ...
as fast as a lightning
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as cold as ice
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as bright as a button
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as fresh as a daisy
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as white as snow
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as warm as a toast
as ... as the ....
as old as the hills
as ... as a ...
as high as a kite
as ... as a ...
as blind as a bat
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as clean as a whistle
as ... as a ...
as free as a bird
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as good as gold
as ... as ...
as hard as nails