Eunuchize is a relatively obscure word that means to castrate or render a male incapable of reproduction. When it comes to synonyms or words that mean the same thing, options include geld, emasculate, sterilize, and neuter. Each of these words describe the removal or disabling of a male's reproductive organs, either entirely or partially. Other potential synonyms for eunuchize might include alter, spay, fix, and cut, although these words may not necessarily imply castration specifically. Regardless of the particular word used, the act of eunuchizing has long been practiced for various reasons, including religious, social, and political factors.