untested vs unseasoned

untested and unseasoned both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untested	No	Yes	No	No
unseasoned	No	Yes	No	No

As adjectives, untested and unseasoned are synonyms defined as:

Other synonyms of untested include untried, young.

untested (adjective)	unseasoned (adjective)
not tried or tested by experience	not aged or processed
not yet proved or subjected to testing	not tried or tested by experience
	without salt or seasoning