tempered vs treated

tempered and treated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
tempered	No	Yes	No	No
treated	No	Yes	No	No

As adjectives, tempered and treated are synonyms defined as:

tempered and treated: made hard or flexible or resilient especially by heat treatment

Other synonyms of tempered include hardened, toughened.

tempered (adjective)	treated (adjective)
adjusted or attuned by adding a counterbalancing element	subjected to a physical (or chemical) treatment or action or agent
made hard or flexible or resilient especially by heat treatment	given medical care or treatment
	made hard or flexible or resilient especially by heat treatment