initiate has 14 distinct synonyms spread across 8 of its 8 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 uninitiate.
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.
someone new to a field or activity
Synonyms, antonyms and the broader and narrower relations for initiate come from Princeton University’s WordNet. Full sources and licences.
someone who has been admitted to membership in a scholarly field
people who have been introduced to the mysteries of some field or activity
“it is very familiar to the initiate”