palatal has 3 distinct synonyms spread across 2 of its 3 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.
produced with the front of the tongue near or touching the hard palate (as `y') or with the blade of the tongue near the hard palate (as `ch' in `chin' or `j' in `gin')
a semivowel produced with the tongue near the palate (like the initial sound in the English word `yeast')
Synonyms, antonyms and the broader and narrower relations for palatal come from Princeton University’s WordNet. Full sources and licences.