Other forms: monticules
Monticule is a fancy word for a small hill or mound. Mount Everest is definitely not a monticule, but that pile of snow left by a snowplow in the parking lot certainly qualifies!
Monticule entered English around 1800 from the Latin monticulus, which combines monti-, "mountain," with the diminutive suffix -culus, "small." Originally, it described a small, secondary cone of a volcano. Today, it's often used more generally — or even humorously — to describe any minor elevation, even a bump: "The sudden collision with the open cupboard door caused a painful monticule to arise on her forehead."