corroborate
verb (used with object)
to make more certain; confirm.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
More recently, there have been corroborating studies in Greece and Austria.
From New York Times ● Sep. 13, 2014