warrant - noun

a writ from a court commanding police to perform specified acts

a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price

formal and explicit approval

a written assurance that some product or service will be provided or will meet certain specifications

warrant - verb

• show to be reasonable or provide adequate ground for
• stand behind and guarantee the quality, accuracy, or condition of

warrant - thesaurus

countenance   endorsement   guarantee   imprimatur   indorsement   justify   sanction   warrantee   warranty