1. A common poplar of eastern and central United States; cultivated in United States for its rapid growth and luxuriant foliage and in Europe for timber
   - necklace poplar, Populus deltoides

Type of: cottonwood

• Klein bottle
• Kleist
• Klemens Metternich
• kleptocracy
• kleptomania
• kleptomaniac
• klezmer
• klick
• klieg light
• Klimt
• Kline
• Klinefelter
• Klinefelter syndrome
• Klinefelter's syndrome
• klipspringer
• klondike
• kloof
• Klopstock
• Klorvess
• Klotho
• kludge
• klutz
• klutzy
• Kluxer
• klystron