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All answers having "Babble" as clue:

3 Character Answers:

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GAB

YAK

YAP



4 Character Answers:

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BLAB

FLAP

RAVE

TALK

WIDE



5 Character Answers:

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BLURT

NOISE

PRATE

RUNON



6 Character Answers:

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NATTER

WITTER



7 Character Answers:

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BLATHER

PRATTLE



8 Character Answers:

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CLAPTRAP



11 Character Answers:

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INCOHERENCE



15 Character Answers:

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PARLEYBIZARRELY