kelpie or kelpy /kelˈpi/

1. A malignant water sprite haunting fords in the form of a horse (Scot; folklore)
2. An Australian breed of sheepdog

• niffy
• niffy-naffy
• Niflheim
• niftier
• niftiest
• niftily
• niftiness
• niftinesses
• nifty
• nigella
• nigellas
• niger
• Nigerian
• Nigerien
• niger oil
• nigers
• niger seeds
• niggard
• niggarded
• niggarding
• niggardise
• niggardises
• niggardize
• niggardizes
• niggardliness