conundrum /kə-nunˈdrəm/

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

• sleeve dog
• sleeve dogs
• sleeved waistcoat
• sleeveen
• sleeveens
• sleeve fish
• sleeve fishes
• sleevehand
• sleevehands
• sleeveless
• sleeve notes
• sleeve nut
• sleeve nuts
• sleever
• sleevers
• sleeves
• sleeve-valve engine
• sleeve-valve engines
• sleeve waistcoat
• sleeve waistcoats
• sleeving
• sleevings
• sleezy
• sleided
• sleigh