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All answers having "Weight" as clue:

3 Character Answers:

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TON



4 Character Answers:

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DRAM

GRAM

HEFT

KILO

LOAD

ONUS

STAT

TROY

TUNS



5 Character Answers:

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CARAT

OUNCE



6 Character Answers:

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BURDEN

IMPORT

STRESS



7 Character Answers:

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LIFTERS

MEGATON

SCRUPLE



8 Character Answers:

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EMPHASIS

POUNDAGE



10 Character Answers:

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IMPORTANCE



11 Character Answers:

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NOIMINARUSH