1. confirm, corroborate, sustain, substantiate, support, affirm

usage: establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant"

2. validate, corroborate, confirm, reassert

usage: give evidence for

3. corroborate, underpin, bear out, support, match, fit, correspond, check, jibe, gibe, tally, agree

usage: support with evidence or authority or make more certain or confirm; "The stories and claims were born out by the evidence"

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See also: corroborate (Dictionary)