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All answers having "Compassionate" as clue:

3 Character Answers:

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RHO



4 Character Answers:

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HOCK

KIND

SOFT



6 Character Answers:

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CARING

HUMANE

REVOKE

TENDER



7 Character Answers:

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LENIENT

PITYING

TREASON



8 Character Answers:

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MERCIFUL



9 Character Answers:

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AEROPLANE



11 Character Answers:

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SOFTHEARTED

SYMPATHETIC

WARMHEARTED



13 Character Answers:

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TENDERHEARTED