tap has 18 distinct synonyms spread across 12 of its 20 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.
draw from or dip into to get something
“tap one's memory”
furnish with a tap or spout, so as to be able to draw liquid from it
“tap a cask of wine”
draw (liquor) from a tap
“tap beer in a bar”
pierce in order to draw a liquid from
“tap a maple tree for its syrup”
Synonyms, antonyms and the broader and narrower relations for tap come from Princeton University’s WordNet. Full sources and licences.
a faucet for drawing water from a pipe or cask
a small metal plate that attaches to the toe or heel of a shoe (as in tap dancing)
a tool for cutting female (internal) screw threads
the act of tapping a telephone or telegraph line to get information