CORROBORATED
Scrabble letter values: C3O1R1R1O1B3O1R1A1T1E1D2 = 17
Definition
CORROBORATED is the past tense of CORROBORATE.
verb CORROBORATE: establish or strengthen as with new evidence or facts.
Synonyms of CORROBORATE: confirm, sustain, substantiate, support, affirm