surtax /sûrˈtaks/

1. An additional tax
2. Tax payable on incomes above a certain high level (term not in official use in this sense)

1. To tax additionally
2. To charge surtax

• superambitious
• superannuable
• superannuate
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• superannuating
• superannuation
• superannuations
• superate
• superated
• superates
• superating
• superation
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• superb
• super bantamweight
• superber
• superbest
• superbike
• superbikes
• superbities
• superbity
• superbly
• superbness
• superbnesses