"substantiation" in the noun sense
1. confirmation, verification, check, substantiation
additional proof that something that was believed (some fact or hypothesis or theory) is correct
"fossils provided further confirmation of the evolutionary theory"
2. validation, proof, substantiation
the act of validating finding or testing the truth of something
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License