legalize (v.)

• authorize
• certificate
• certify
• charter
• constitute
• decree
• empower
• enable
• enact
• enfranchise
• entitle
• establish
• formulate
• franchise
• legislate
• legitimate
• legitimatize
• legitimize
• license
• ordain
• patent
• prescribe
• privilege
• ratify
• regulate
• sanction
• validate
• warrant