claw has 4 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.
sharp curved horny process on the toe of a bird or some mammals or reptiles
a mechanical device that is curved or bent to suspend or hold or pull something
move as if by clawing, seizing, or digging
“They clawed their way to the top of the mountain”
clutch as if in panic
“She clawed the doorknob”
scratch, scrape, pull, or dig with claws or nails
attack as if with claws
“The politician clawed his rival”
Synonyms, antonyms and the broader and narrower relations for claw come from Princeton University’s WordNet. Full sources and licences.