humdinger /hum-dingˈər/ (slang)

1. An exceptionally excellent person or thing
2. A smooth-running engine
3. A swift vehicle or aircraft

• colloquists
• colloquium
• colloquiums
• colloquize
• colloquized
• colloquizes
• colloquizing
• colloquy
• colloquying
• collotype
• collotypes
• collotypic
• colls
• colluctation
• colluctations
• collude
• colluded
• colluder
• colluders
• colludes
• colluding
• collusion
• collusions
• collusive
• collusively