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All answers having "Vile" as clue:

4 Character Answers:

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BASE

EVIL



5 Character Answers:

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NASTY

SLIMY



6 Character Answers:

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ODIOUS

SORDID



7 Character Answers:

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BEASTLY

IGNOBLE



9 Character Answers:

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REPUGNANT



12 Character Answers:

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CONTEMPTIBLE