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attest
authenticate
back
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bear out
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circumstantiate
confirm
corroborated
document
establish
fortify
justify
probate
prove
ratify
reinforce
strengthen
substantiate
support
sustain
undergird
uphold
validate
verify
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agree
check
correspond
fit
gibe
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match
tally
demonstrate
shew
show
vouch
corroborates
corroborating
corroboration
corroborative
corroborator