untempered vs unhardened

untempered and unhardened both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untempered	No	Yes	No	No
unhardened	No	Yes	No	No

As adjectives, untempered and unhardened are synonyms defined as:

untempered and unhardened: not brought to a proper consistency or hardness

untempered (adjective)	unhardened (adjective)
not moderated or controlled	not brought to a proper consistency or hardness
not brought to a proper consistency or hardness