Mammoth Uncensored Word List:
35 words ending with my, 13 letters long

adenoidectomy adrenalectomy aluminothermy auriculectomy chemotaxonomy choroidectomy clitoridotomy electrothermy encephalotomy esophagectomy esophagostomy hemicolectomy mastoidectomy parotidectomy pharyngectomy pharyngostomy pneumonectomy poikilothermy postvasectomy prostatectomy pyloromyotomy salpingectomy salpingostomy sigmoidectomy sigmoidostomy sympathectomy symphyseotomy symphysiotomy thyroidectomy tonsillectomy trachelectomy trapeziectomy vasovasostomy vertebrectomy vesiculectomy