brace oneself for vs harden

brace oneself for and harden both are verbs.

Word	Noun	Adjective	Verb	Adverb
brace oneself for	No	No	Yes	No
harden	No	No	Yes	No

As verbs, harden is a hypernym of brace oneself for; that is, harden is a word with a broader meaning than brace oneself for:

Other hypernyms of brace oneself for include indurate, inure.

brace oneself for (verb)	harden (verb)
prepare mentally or emotionally for something unpleasant	become hard or harder
	make hard or harder
	make healthy
	cause to accept or become hardened to; habituate
	harden by reheating and cooling in oil