rim has 3 distinct synonyms spread across 2 of its 8 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.
the shape of a raised edge of a more or less circular object
(basketball) the hoop from which the net is suspended
“the ball hit the rim and bounced off”
Synonyms, antonyms and the broader and narrower relations for rim come from Princeton University’s WordNet. Full sources and licences.
a projection used for strength or for attaching to another object
roll around the rim of
“the ball rimmed the basket”