Mammoth Uncensored Word List:
37 words ending with py, 9 letters long

allocarpy allotropy auriscopy autoscopy azeotropy chemitypy collotypy coloscopy cryoscopy endoscopy fetoscopy heliotypy hemitropy horoscopy hushpuppy ileoscopy ionotropy lipotropy macrocopy manoscopy microcopy milksoppy multicopy ouroscopy overhappy phenocopy phonotypy photocopy phototypy polycarpy poroscopy preoccupy presbyopy skiascopy slaphappy stenotypy telescopy