Corroborer

Corroborer is a noun that denotes a person or thing that provides corroboration—evidence, testimony, or other support that strengthens a claim, statement, or theory. In legal contexts, a corroborer is someone whose independent confirmation lends weight to a witness’s account. In journalism and research, corroborating sources or corroborating evidence serve to verify facts beyond the initial claim.

Etymology and usage notes: The word derives from the verb corroborate, which comes from Latin corroborare, meaning to strengthen, from robor “strength.” The agent noun can be formed as corroborator or corroborer; corroborator is more common in some varieties, while corroborer is also used.

Contexts and examples: Corroborers are typically expected to provide independent or additional support. A corroborer’s testimony is stronger when it corroborates multiple independent sources. In data analysis, forensics, or investigative work, a corroborer may refer to a method, source, or piece of evidence that confirms a finding, though the term is more often described simply as corroborating evidence or independent verification.

See also: corroboration, corroborating witness, corroborating evidence, corroborate, verification, attestation.