official has 2 distinct synonyms spread across 2 of its 7 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is unofficial.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
having official authority or sanction
“official permission”
a worker who holds or is invested with an office
3 of the 7 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for official.
Synonyms, antonyms and the broader and narrower relations for official come from Princeton University’s WordNet. Full sources and licences.
someone who administers the rules of a game or sport
“the golfer asked for an official who could give him a ruling”