harden vs normalize

harden and normalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
harden	No	No	Yes	No
normalize	No	No	Yes	No

As verbs, normalize is a hyponym of harden; that is, normalize is a word with a more specific, narrower meaning than harden:

harden: make hard or harder
normalize: bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling

Other hyponyms of harden include face-harden, callus, anneal, temper.

harden (verb)	normalize (verb)
become hard or harder	make normal or cause to conform to a norm or standard
make hard or harder	bring to a desired consistency, texture, or hardness by a process of gradually heating and cooling
make healthy	become normal or return to its normal state
cause to accept or become hardened to; habituate
harden by reheating and cooling in oil