town has 4 distinct synonyms spread across 3 of its 4 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.
an urban area with a fixed boundary that is smaller than a city
“they drive through town on their way to work”
the people living in a municipality smaller than a city
“the whole town cheered the team”
an administrative division of a county
“the town is responsible for snow removal”
United States architect who was noted for his design and construction of truss bridges (1784-1844)
Synonyms, antonyms and the broader and narrower relations for town come from Princeton University’s WordNet. Full sources and licences.