word has 24 distinct synonyms spread across 7 of its 11 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
a unit of language that native speakers can identify
“words are the blocks from which sentences are made”
a brief statement
“he didn't say a word about it”
information about recent and important events
“they awaited news of the outcome”
a verbal command for action
“when I give the word, charge!”
a string of bits stored in computer memory
“large computers use words up to 64 bits long”
the divine word of God; the second person in the Trinity (incarnate in Jesus)
a secret word or phrase known only to a restricted group
“he forgot the password”
the sacred writings of the Christian religions
“he went to carry the Word to the heathen”
put into words or an expression
“He formulated his concerns to the board of trustees”
Synonyms, antonyms and the broader and narrower relations for word come from Princeton University’s WordNet. Full sources and licences.