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All answers having "Household appliance" as clue:

3 Character Answers:

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VAC



4 Character Answers:

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IRON

UNIT



5 Character Answers:

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DRIER

DRYER

RANGE

WAXER



6 Character Answers:

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HEATER

IRONER

VACUUM

WASHER



7 Character Answers:

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SWEEPER

TOASTER



9 Character Answers:

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STEAMIRON



15 Character Answers:

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ELECTRICTOASTER