stroke has 15 distinct synonyms spread across 6 of its 16 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.
(sports) the act of swinging or striking at a ball with a club or racket or bat or cue or hand
“it took two strokes to get out of the bunker”
the maximum movement available to a pivoted or reciprocating piece by a cam
a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain
(golf) the unit of scoring in golf is the act of hitting the ball with a club
“Nicklaus won by three strokes”
the oarsman nearest the stern of the shell who sets the pace for the rest of the crew
anything that happens suddenly or by chance without an apparent cause
“winning the lottery was a happy accident”
a punctuation mark (/) used to separate related items of information
a mark made on a surface by a pen, pencil, or paintbrush
“she applied the paint in careful strokes”
any one of the repeated movements of the limbs and body used for locomotion in swimming or rowing
strike a ball with a smooth blow
Synonyms, antonyms and the broader and narrower relations for stroke come from Princeton University’s WordNet. Full sources and licences.
treat gingerly or carefully
“You have to stroke the boss”