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All answers having "Modernize" as clue:

4 Character Answers:

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REDO



5 Character Answers:

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REFIT

RENEW

WIDEN



6 Character Answers:

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RETOOL

REVAMP

UPDATE



7 Character Answers:

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REMODEL

RESTORE

RESTYLE

REVAMPS

UPGRADE



8 Character Answers:

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OVERHAUL

RENOVATE

RETROFIT



10 Character Answers:

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REDECORATE

STREAMLINE