Synonyms for Castrate (same or very similar meaning)
WordNet sense 1 (deprive of strength or vigor):
emasculateWordNet sense 2 (edit by omitting or modifying parts considered indelicate):
bowdlerize, expurgate, shorten, bowdleriseWordNet sense 3 (remove the testicles of a male animal):
demasculinise, demasculinizeWordNet sense 4 (remove the ovaries of):
alter, neuter, spayFrom the ODE community, based on WordNetadd/edit