- hydromagnetics
- hydromancies
- hydromancy
- hydromechanics
- hydromedusa
- hydromedusae
- hydromel
- hydromels
- hydrometallurgy
- hydrometeor
- hydrometeorology
- hydrometer
- hydronic
- hydronium
- hydroniums
- hydropathies
- hydropathy
- hydrophane
- hydrophanes
- hydrophile
- hydrophilic
- hydrophilous
- hydrophobia
- hydrophobic
- hydrophone