There are a total of 17 11-letter words containing 'fract', and the number may vary in different dictionaries. You can specify the dictionary and order.

• anfractuous ₂₀
• diffracting ₂₄
• diffraction ₂₂
• diffractive ₂₅
• fractionate ₁₈
• fractioning ₂₁
• fractiously ₂₁
• infractions ₁₉
• refractions ₁₈
• fractionary ₁₉
• fractionise ₁₆
• fractionize ₂₅
• fractionlet ₁₆
• fracturable ₁₈
• refractable ₁₈
• refractures ₁₆
• unrefracted ₁₇

There are 17 11-letter words containing fract in the well-known word game dictionary, 8 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 17 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 9 in the Words with Friends (WWF) dictionary.