network has 6 distinct synonyms spread across 3 of its 6 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.
Synonyms, antonyms and the broader and narrower relations for network come from Princeton University’s WordNet. Full sources and licences.
(broadcasting) a communication system consisting of a group of broadcasting stations that all transmit the same programs
“the networks compete to broadcast important sports events”
an open fabric of string or rope or wire woven together at regular intervals
a system of intersecting lines or channels
“a railroad network”
(electronics) a system of interconnected electronic components or circuits
communicate with and within a group
“You have to network if you want to get a good job”