Mammoth Uncensored Word List:
28 words ending with gy, 15 letters long

anaesthesiology anthropobiology counterstrategy electrorheology ethnomusicology geomicrobiology hematopathology histomorphology histophysiology hydrometallurgy immunopathology lepidopterology macromorphology micromorphology microseismology microtechnology neurophysiology neuropsychology neurotoxicology palaeoethnology palaeolimnology palaeopathology palaeophytology pathophysiology physiopathology phytomorphology phytophysiology psychopathology