ratify (v.)

• accept
• accredit
• adopt
• affiliate
• affirm
• approve
• assent
• attest
• authenticate
• authorize
• autograph
• back
• bolster
• buttress
• carry
• certificate
• certify
• charter
• circumstantiate
• clinch
• commission
• condescend
• confirm
• consent
• corroborate
• cosign
• countersign
• deign
• document
• embrace
• empower
• enable
• endorse
• enfranchise
• ensure
• entitle
• espouse
• establish
• fortify
• franchise
• grant
• guarantee
• initial
• legalize
• legitimize
• license
• nod
• notarize
• okay
• pass
• patent
• permit
• privilege
• probate
• prove
• reinforce
• sanction
• seal
• second
• settle
• sign
• strengthen
• substantiate
• support
• sustain
• undergird
• undersign
• underwrite
• uphold
• validate
• verify
• visa
• vise
• warrant