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All answers having "Sham" as clue:

3 Character Answers:

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ACT

RHO



4 Character Answers:

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FAKE

HOAX

HOKE

MOCK



5 Character Answers:

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BOGUS

CHEAT

FALSE

FEIGN

FEINT

LETON

PHONY

PSEUD



6 Character Answers:

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ERSATZ

PHONEY

PSEUDO



7 Character Answers:

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PRETEND



8 Character Answers:

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PRETENCE

PRETENSE

TRAVESTY



11 Character Answers:

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WEBOFDECEIT