Synonyms for Authority

Warranty
affidavit attestation authority authorization bill of health certificate	certification countenance credential deposition diploma fiat	note ratification sheepskin sworn statement testimonial ticket	visa voucher warranty witness

Rule
acme authority authorization blue ribbon brevet championship command control directorship	dominion effectiveness first place first prize height highest influence jurisdiction kingship	leadership lordship management mastership mastery maximum most ne plus ultra paramountcy	presidency primacy record rule say sovereignty supremacy sway zenith

Assignment
agency allotment assignment authority authorization brevet commitment	consignment cure delegation deputation embassy errand jurisdiction	legation license mandate mission office power of attorney proxy	purview regency responsibility task trust trusteeship warrant

Source
adviser announcer antecedent authority channel communicant	enlightener grapevine informant informer monitor mouthpiece	newsmonger press publisher radio reporter source	spokesman television teller tipster tout

Pundit
abecedarian aficionado amateur authority buff	connoisseur critic dilettante expert	fan freak nut pundit	savant scholar specialist technician