There are a total of 76 9-letter words containing 'poly', and the number may vary in different dictionaries. You can specify the dictionary and order.

• copolymer ₂₁
• lipolyses ₁₆
• lipolysis ₁₆
• lipolytic ₁₉
• oligopoly ₁₈
• polyamide ₁₉
• polyamine ₁₉
• polyamory ₂₀
• polyandry ₁₉
• polyantha ₁₈
• polyanthi ₁₈
• polybrids ₁₉
• polyester ₁₅
• polygalas ₁₈
• polygamic ₂₃
• polygenes ₁₈
• polygenic ₂₁
• polyglots ₁₈
• polygonal ₁₉
• polygonum ₂₂
• polygraph ₂₂
• polyhedra ₁₈
• polyimide ₁₉
• polymaths ₂₀
• polymathy ₂₂
• polymeric ₂₁
• polymorph ₂₃
• polymyxin ₂₈
• polyphagy ₂₄
• polyphase ₂₀
• polyphone ₂₁
• polyphony ₂₃
• polypides ₁₉
• polyploid ₂₀
• polypneas ₁₉
• polypores ₁₈
• polyposis ₁₈
• polyptych ₂₅
• polypuses ₁₉
• polysemic ₂₁
• polysomes ₁₈
• polythene ₁₈
• polytonal ₁₇
• polytypes ₂₀
• polytypic ₂₃
• polyurias ₁₆
• polyvinyl ₂₃
• polywater ₁₈
• polyzoans ₂₅
• polybasic ₁₈
• polycarpy ₂₁
• polychete ₁₉
• polyonymy ₂₂
• polyparia ₁₆
• polypneic ₁₈
• polysomic ₁₈
• polyzoary ₂₆
• polyarchy ₂₂
• polyaxial ₂₁
• polyaxons ₂₁
• polyconic ₁₈
• polydemic ₁₉
• polyglott ₁₅
• polylemma ₁₈
• polymasty ₁₉
• polyomino ₁₆
• polyonyms ₁₉
• polyphons ₁₉
• polypidom ₁₉
• polypills ₁₆
• polypites ₁₆
• polyposes ₁₆
• polysemes ₁₆
• polystyle ₁₇
• polyzonal ₂₃
• polyzooid ₂₄

There are 76 9-letter words containing poly in the well-known word game dictionary, 56 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 75 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 49 in the Words with Friends (WWF) dictionary.