suboctave /sub-okˈtiv/

1. The octave below
2. (also suboctave coupler) an organ coupler that gives an octave below

• unbranded
• unbraste
• unbreachable
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• unbreakable
• unbreathable
• unbreathed
• unbreathed-on
• unbreathing
• unbred
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• unbribable
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• unbridle
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• unbridledness
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• unbridles
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• un-British
• unbrizzed
• unbroke