castrate vs weaken

castrate is a noun but weaken is not a noun.

Word	Noun	Adjective	Verb	Adverb
castrate	Yes	No	Yes	No
weaken	No	No	Yes	No

As verbs, weaken is a hypernym of castrate; that is, weaken is a word with a broader meaning than castrate:

castrate (noun)	weaken (noun)
a man who has been castrated and is incapable of reproduction

castrate (verb)	weaken (verb)
remove the testicles of a male animal	become weaker
remove the ovaries of	lessen the strength of
deprive of strength or vigor	reduce the level or intensity or size or scope of
edit by omitting or modifying parts considered indelicate	lessen in force or effect
	destroy property or hinder normal operations