1. The sport of exploring canyons by rafting, swimming, climbing, etc.
   - canyoneering [N. Amer]

Encyclopedia: Canyoning

• holding pen
• holding yard
• holdout
• holdover
• holdup
• holdup man
• hole
• hole card
• hole in one
• hole out
• hole up
• hole-and-corner
• hole-in-corner
• hole-in-the-wall
• holey
• holibut
• holiday
• holiday home
• holiday resort
• holiday season
• holidaymaker
• holier-than-thou
• holily
• holiness
• holism