communicate has 8 distinct synonyms spread across 4 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 excommunicate.
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.
transmit information
“Please communicate this message to all employees”
join or connect
“The rooms communicated”
administer Communion; in church
Synonyms, antonyms and the broader and narrower relations for communicate come from Princeton University’s WordNet. Full sources and licences.