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All answers having "Vigorous" as clue:

3 Character Answers:

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WAR



4 Character Answers:

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DAZE

HALE

MALE

SPRY



5 Character Answers:

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ALIVE

BRISK

FRESH

GUSTO

HARDY

LUSTY

PEPPY

SHARP



6 Character Answers:

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HEARTY

PUNCHY

ROBUST

RUGGED

STRONG

STURDY



7 Character Answers:

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ANIMATE

DRIVING

DYNAMIC

THISTLE



8 Character Answers:

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ANIMATED

ATHLETIC

BOUNCING

ROBUSTIC

SPIRITED



9 Character Answers:

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ENERGETIC



13 Character Answers:

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HALEANDHEARTY