kobold /kōˈbold/ (Ger folklore)

1. A spirit of the mines
2. A benevolent creature who may secretly help with domestic work

• hydrothermal
• hydrothoraces
• hydrothorax
• hydrothoraxes
• hydrotropic
• hydrotropism
• hydrotropisms
• hydrous
• hydrovane
• hydrovanes
• hydroxide
• hydroxides
• hydroxy
• hydroxyapatite
• hydroxyl
• hydroxylamine
• hydroxylamines
• hydroxylate
• hydroxylated
• hydroxylates
• hydroxylating
• hydroxyls
• hydroxy-propanoic acid
• hydroxyurea
• hydrozincite