suboctave /sub-okˈtiv/

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

• flutemouths
• fluter
• fluters
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• flutina
• flutinas
• fluting
• flutings
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• flutists
• flutter
• fluttered
• fluttering
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• flutter the dovecots
• flutter-tonguing
• fluttery
• fluty
• fluvial
• fluvialist
• fluvialists
• fluviatic
• fluviatile