- The sport or activity of climbing sheer rock faces, especially by means of specialized techniques and equipment.攀岩：攀登陡峭岩面的运动或活动，尤指借助专业技巧和装备
- uninspired
- uninstall
- uninstructed
- uninsurable
- uninsured
- unintelligent
- unintelligible
- unintended
- unintentional
- uninterest
- uninterested
- uninteresting
- uninuclear
- uninucleate
- uninvited
- uninviting
- uninvolved
- union
- union
- Union
- union catalog
- union church
- Union City
- Union College (Kentucky)
- Union College (Kentucky)