endorse (v.)

• abet
• accept
• accredit
• admire
• advocate
• affirm
• approve
• assent
• assure
• attest
• authenticate
• authorize
• autograph
• back
• bless
• bond
• certify
• champion
• comfort
• command
• condescend
• confirm
• consent
• cosign
• countenance
• countersign
• deign
• elect
• embolden
• encourage
• ensure
• esteem
• favor
• grant
• guarantee
• hearten
• indorse
• initial
• insure
• nod
• nominate
• notarize
• okay
• pass
• permit
• ratify
• recommend
• respect
• sanction
• seal
• second
• secure
• sign
• sponsor
• subscribe
• support
• sustain
• undersign
• underwrite
• uphold
• validate
• visa
• vise
• vote
• vouch
• warrant
• witness