conundrum /kə-nunˈdrəm/

1. A riddle, esp one whose answer is a play on words
2. Any puzzling question

• hand-in-hand
• hand-ins
• hand it to someone
• handiwork
• handiworks
• handjar
• handjars
• handjob
• handjobs
• handkercher
• handkerchief
• handkerchiefs
• handkerchieves
• hand-knit
• handknit
• hand-knits
• handknits
• hand-knitted
• hand-knitting
• handle
• handlebar
• handlebar moustache
• handlebar moustaches
• handlebars
• handled