neutering vs sterilization

neutering and sterilization both are nouns.

Word	Noun	Adjective	Verb	Adverb
neutering	Yes	No	No	No
sterilization	Yes	No	No	No

As nouns, sterilization is a hypernym of neutering; that is, sterilization is a word with a broader meaning than neutering:

neutering: the sterilization of an animal
sterilization: the act of making an organism barren or infertile (unable to reproduce)

Other hypernyms of neutering include sterilisation.

neutering (noun)	sterilization (noun)
the sterilization of an animal	the act of making an organism barren or infertile (unable to reproduce)
	the procedure of making some object free of live bacteria or other microorganisms (usually by heat or chemical means)