steel oneself against vs harden

steel oneself against and harden both are verbs.

Word	Noun	Adjective	Verb	Adverb
steel oneself against	No	No	Yes	No
harden	No	No	Yes	No

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

steel oneself against: prepare mentally or emotionally for something unpleasant
harden: cause to accept or become hardened to; habituate

Other hypernyms of steel oneself against include indurate, inure.

steel oneself against (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