Synonyms: 93
credential
authorization
passport
credentials
permit
license
permission
chit
verification
assure
justification
basis
foundation
reason
attestation
authentication
confirmation
corroboration
demonstration
evidence
proof
substantiation
testament
testimonial
testimony
validation
earnest
guaranty
pawn
pledge
security
token
guarantee
surety
warranty
assurance
covenant
engagement
plight
promise
solemn word
vow
word
word of honor
attest
authenticate
back
bear out
confirm
corroborate
substantiate
testify
validate
verify
ensure
insure
secure
cinch
certify
call for
occasion
authorize
certificate
claim
commission
defend
document
guard
order
protect
protection
safeguard
sanction
subpoena
uphold
vouch
voucher
writ
warrantee
countenance
endorsement
indorsement
imprimatur
stock warrant
stock-purchase warrant
official document
pass
vouch-for
give grounds for
empower
affirm
authority
grounds
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