knoll¹ /nōl/ (Scot knowe /now/)

1. A round hillock
2. The top of a hill (dialect)

• Hygeian
• hygiene
• hygienes
• hygienic
• hygienically
• hygienics
• hygienist
• hygienists
• hygristor
• hygristors
• hygro-
• hygrochasies
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• hygrodeik
• hygrodeiks
• hygrograph
• hygrographic
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• hygrologies
• hygrology
• hygrometer
• hygrometers
• hygrometric