OK
abet
accede to
accept
accord to
accredit
admire
advocate
affirm
agree to
aid and abet
amen
approve
approve of
assent
assure
attest
authenticate
authorize
autograph
back
back up
be sponsor for
be willing
bless
bond
certify
comfort
condescend
confirm
connive at
consent
consent to silently
cosign
countenance
countersecure
countersign
deign
elect
embolden
encourage
endorse
ensure
esteem
favor
give consent
give permission
give the go-ahead
give the imprimatur
guarantee
support
warrant
indorsed
indorses
indorsing