UNAUTHORIZED Synonyms: 91 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/unauthorized
WebSynonyms for UNAUTHORIZED: improper, illicit, illegal, unlawful, inappropriate, unacceptable, illegitimate, prohibited; Antonyms of UNAUTHORIZED: appropriate, legal, lawful, legitimate, permitted, acceptable, authorized, licensed.
DA: 42 PA: 67 MOZ Rank: 83