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All answers having "Regions" as clue:

3 Character Answers:

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DIM



4 Character Answers:

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LONE



5 Character Answers:

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AREAS

LANDS

POLAR

ZONES



6 Character Answers:

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NETHER

TRACTS



7 Character Answers:

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SPHERES



8 Character Answers:

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TERRAINS



9 Character Answers:

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DISTRICTS



14 Character Answers:

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GEOGRAPHICARES