There are a total of 169 9-letter words containing 'py', and the number may vary in different dictionaries. You can specify the dictionary and order.

• aepyornis ₁₅
• allotropy ₁₆
• antipyics ₁₈
• bipyramid ₂₁
• canopying ₂₁
• capybaras ₂₀
• copybooks ₂₄
• copydesks ₂₂
• copyedits ₁₈
• copyholds ₂₁
• copyreads ₁₈
• copyright ₂₁
• cryoscopy ₂₂
• empyemata ₂₀
• empyreans ₁₈
• endoscopy ₁₉
• fetoscopy ₂₀
• horoscopy ₁₉
• hypopyons ₂₂
• isopropyl ₁₈
• isopycnal ₁₉
• isopycnic ₂₁
• lampyrids ₁₉
• microcopy ₂₃
• micropyle ₂₁
• monotropy ₁₈
• multicopy ₂₂
• occupying ₂₄
• pappyshow ₂₅
• papyruses ₁₈
• phenocopy ₂₃
• photocopy ₂₂
• poppycock ₃₀
• poppyhead ₂₃
• preoccupy ₂₄
• propylaea ₁₈
• propylene ₁₉
• propylons ₁₉
• puppydogs ₂₄
• puppydoms ₂₅
• puppyhood ₂₄
• puppylike ₂₆
• pycnidial ₂₀
• pycnidium ₂₃
• pyelogram ₂₀
• pygmyisms ₂₄
• pygostyle ₁₉
• pyinkados ₂₀
• pyloruses ₁₆
• pyodermas ₁₈
• pyorrheas ₁₆
• pyorrhoea ₁₆
• pyramidal ₁₉
• pyramided ₁₉
• pyramidic ₂₁
• pyranoses ₁₅
• pyrenoids ₁₆
• pyrethrin ₁₇
• pyrethrum ₂₀
• pyridines ₁₆
• pyridoxal ₂₃
• pyritised ₁₅
• pyritises ₁₄
• pyritized ₂₄
• pyritizes ₂₃
• pyroclast ₁₈
• pyrogenic ₂₀
• pyrolized ₂₅
• pyrolizes ₂₄
• pyrolysed ₁₈
• pyrolyses ₁₇
• pyrolysis ₁₇
• pyrolytic ₂₀
• pyrolyzed ₂₇
• pyrolyzer ₂₆
• pyrolyzes ₂₆
• pyromancy ₂₃
• pyromania ₁₈
• pyromanic ₂₁
• pyrometer ₁₇
• pyrometry ₁₉
• pyronines ₁₆
• pyrosises ₁₄
• pyrostats ₁₄
• pyroxenes ₂₂
• pyroxenic ₂₅
• pyroxylin ₂₅
• pyruvates ₁₉
• pythoness ₁₇
• recopying ₂₀
• scrapyard ₁₈
• shipyards ₁₇
• slaphappy ₂₃
• spymaster ₁₇
• stenotypy ₁₇
• tippytoed ₁₈
• tippytoes ₁₇
• uropygial ₁₈
• uropygium ₂₁
• azeotropy ₂₃
• collotypy ₁₉
• copygirls ₁₇
• copylefts ₁₉
• harpylike ₂₁
• heliotypy ₂₀
• hushpuppy ₂₄
• lipotropy ₁₆
• milksoppy ₂₂
• phonotypy ₂₂
• polycarpy ₂₁
• poppyseed ₁₉
• propylite ₁₆
• pyodermic ₁₉
• pyorrheal ₁₇
• pyralidid ₁₆
• pyridoxin ₂₂
• pyritical ₁₆
• pyroceram ₁₈
• skiascopy ₂₀
• telescopy ₁₆
• yuppydoms ₂₂
• aeolipyle ₁₄
• albespyne ₁₆
• allocarpy ₁₆
• apyrexias ₂₁
• autoscopy ₁₆
• chemitypy ₂₄
• copygraph ₂₂
• copytaker ₂₀
• diapyeses ₁₅
• diapyesis ₁₅
• diapyetic ₁₇
• empyreuma ₁₈
• epyllions ₁₄
• hemitropy ₁₉
• hippydoms ₂₂
• ionotropy ₁₄
• macrocopy ₂₀
• manoscopy ₁₈
• ouroscopy ₁₆
• overhappy ₂₂
• phototypy ₂₂
• poroscopy ₁₈
• presbyopy ₂₁
• puppyisms ₂₀
• pyengadus ₁₆
• pygidiums ₁₈
• pyknosome ₂₀
• pyorrheic ₁₉
• pyracanth ₁₉
• pyralises ₁₄
• pyramides ₁₇
• pyramidia ₁₇
• pyramidon ₁₇
• pyramises ₁₆
• pyrazoles ₂₃
• pyreneite ₁₄
• pyrolater ₁₄
• pyrolatry ₁₇
• pyrolised ₁₅
• pyrolises ₁₄
• pyrolyser ₁₇
• pyrophone ₁₉
• pyropuses ₁₆
• pyroscope ₁₈
• pyrosomes ₁₆
• pyroxyles ₂₄
• pyroxylic ₂₆
• spyplanes ₁₆

There are 169 9-letter words containing py in the well-known word game dictionary, 112 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 163 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 99 in the Words with Friends (WWF) dictionary.