UNREGISTERED Synonyms: 14 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/unregistered
WEBSynonyms for UNREGISTERED: unlisted, unrecorded, undisclosed, unidentified, unspecified, uncataloged, unknown, unwritten; Antonyms of UNREGISTERED: registered, recorded, listed, cataloged, catalogued.
DA: 43 PA: 53 MOZ Rank: 15