WordNet records no synonym and no antonym for oral personality. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
(psychoanalysis) a personality characterized either by generous optimism or aggressive and ambitious selfishness; formed in early childhood by fixation during the oral stage of development
Synonyms, antonyms and the broader and narrower relations for oral personality come from Princeton University’s WordNet. Full sources and licences.