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

• swellingly
• swellings
• swellish
• swell-mob
• swell-mobs
• swell-mobsman
• swell-mobsmen
• swell organ
• swell organs
• swells
• swelt
• swelted
• swelter
• sweltered
• sweltering
• swelterings
• swelters
• swelting
• sweltrier
• sweltriest
• sweltry
• climatology
• climature
• climatures
• climax