duffer¹ /dufˈər/

1. An unskilful or worthless person (informal)
2. A fogey, a useless old fellow (informal)
3. A counterfeit coin
4. An unproductive mine

• kala-azar
• Kalamazoo system
• kalamdan
• kalamdans
• kalamkari
• kalamkaris
• goniometer
• goniometers
• goniometric
• goniometrical
• goniometrically
• goniometries
• goniometry
• gonion
• gonk
• gonks
• gonna
• gonococcal
• gonococci
• gonococcic
• gonococcoid
• gonococcus
• gonocyte
• gonocytes
• gonophore