Noun

• S: (n) warrant (a writ from a court commanding police to perform specified acts)
• S: (n) warrant, stock warrant, stock-purchase warrant (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) "as a sweetener they offered warrants along with the fixed-income securities"
• S: (n) sanction, countenance, endorsement, indorsement, warrant, imprimatur (formal and explicit approval) "a Democrat usually gets the union's endorsement"
• S: (n) guarantee, warrant, warrantee, warranty (a written assurance that some product or service will be provided or will meet certain specifications)

Verb

• S: (v) warrant (provide adequate grounds to justify (a certain course of action)) "The emergency does not warrant all of us buying guns"
• S: (v) guarantee, warrant (stand behind and guarantee the quality, accuracy, or condition of) "The dealer warrants all the cars he sells"; "I warrant this information"