orchiectomy

In surgery terms the difference between vasectomy and orchiectomy

is that vasectomy is the surgical removal of all or part of the vas deferens, usually as a means of male sterilization while orchiectomy is the procedure to remove one or both testes.

As nouns the difference between taxonomy and orchiectomy

is that taxonomy is the science or the technique used to make a classification while orchiectomy is (label) the procedure to remove one or both testes.

As a noun orchiectomy

is the procedure to remove one or both testes.

As an adjective castrated is

having had the reproductive organs removed (testicles in males, ovaries in females).

As a verb castrated is

past tense of castrate.