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All answers having "Boor" as clue:

3 Character Answers:

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APE

ASS

CAD

OAF



4 Character Answers:

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CLOD

JERK

LOUT

SLOB



5 Character Answers:

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BRUTE

CHURL

YAHOO



6 Character Answers:

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BABOON

CRETIN

RUSTRE



14 Character Answers:

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COUNTRYBUMPKIN