bookmobile/ʹbookməbeel/ noun

• hydrolysis
• hydrolyze
• hydromagnetic
• hydromassage
• hydromechanics
• hydromel
• hydrometer
• hydronaut
• hydronic
• hydronium
• hydropathy
• hydrophane
• hydrophilic
• hydrophobia
• hydrophobic
• hydrophone
• hydrophyte
• hydroplane
• hydroponics
• hydropower
• hydroquinone
• hydrospeed
• hydrosphere
• hydrostatic
• hydrostatical