Mammoth Uncensored Word List:
22 words ending with hy, 17 letters long

angiocardiography cheiroarthropathy chemoheterotrophy chemoorganotrophy chemostratigraphy cholecystorrhaphy cholescintigraphy chromolithography chronophotography cyclostratigraphy electrohomeopathy encephalomyopathy lithoheterotrophy lithostratigraphy paleobiogeography pericardiorrhaphy phonocardiography photofluorography photoheterotrophy scintimammography stereolithography stereophotography