gate has 1 distinct synonym spread across 1 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. 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 movable barrier in a fence or wall
Synonyms, antonyms and the broader and narrower relations for gate come from Princeton University’s WordNet. Full sources and licences.
a computer circuit with several inputs but only one output that can be activated by particular combinations of inputs
total admission receipts at a sports event
passageway (as in an air terminal) where passengers can embark or disembark
supply with a gate
“The house was gated”
control with a valve or other device that functions like a gate
restrict (school boys') movement to the dormitory or campus as a means of punishment