The best replacement for castration is neutering.

The best alternatives to castration are rated as following:
★★★★★  neutering
★★★  vasectomy
★★★  orchiectomy
★★  decapitation
★★  banding
★  surgical castration
★  eunuch
★  gelding
  open castration
  chemical castration
  orchidectomy
  spaying
  surgical
  neuter
  penectomy

Your alternative for castration is not listed? Suggest!
Speaking about castration, one probably shouldn't forget about penectomy.

Other search terms related to castration and their ratings are:
★★★★★ penectomy
You have in mind a companion for castration and it is not yet here? Propose!



Google Trends

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castration
neutering
vasectomy