This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To strengthen or support with other evidence; make more certain. See Synonyms at confirm.

v. To confirm, strengthen or support something with additional evidence; to attest or vouch.

v. To make strong, or to give additional strength to; to strengthen.

v. To make more certain; to confirm; to establish.

adj. Corroborated.

To strengthen; make strong, or impart additional strength to: as, to corroborate the judgment, will, or habits.

To confirm; make more certain; give additional assurance of: as, the news is corroborated by recent advices.

Corroborated; strengthened; confirmed.

v. support with evidence or authority or make more certain or confirm

v. give evidence for

v. establish or strengthen as with new evidence or facts

"These terms corroborate and identify themselves with the most ancient of traditionary customs, long ere princes had monopolised the surface of coined money with their own images and superscriptions."

corroborated    corroborates    corroborating   

fit    tally    check    correspond    match    jibe    gibe    agree   

corroborative    corroboration    corroborator   

vouch    prove    demonstrate    document    shew    verify    establish    back    show    back up   

confirm    establish    corroborated