cataract /katˈə-rakt/

1. A waterfall
2. A waterspout, etc
3. An opaque condition of the lens of the eye, painless, unaccompanied by inflammation
4. The area rendered opaque, which is surgically removable
5. A portcullis (obsolete)
6. A floodgate (Milton)

• underinvestment
• under-jaw
• underjawed
• under-jaws
• underkeep
• underkeeper
• underkeepers
• underkeeping
• underkeeps
• underkept
• underking
• underkingdom
• underkingdoms
• underkings
• underlaid
• underlain
• underlap
• underlapped
• underlapping
• underlaps
• underlay
• underlayer
• underlayers
• underlaying
• underlays