WordNet records no synonym and no antonym for pressure point. It is the only member of each of its synsets, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
any of several points on the body where the pulse can be felt and where pressure on an underlying artery will control bleeding from that artery at a more distal point
where problems or difficulties are likely to occur
“a key pressure point in the controversy was the building permit”
an area on the skin that is highly sensitive to pressure
“you must know the pressure points in order to administer shiatsu”
Synonyms, antonyms and the broader and narrower relations for pressure point come from Princeton University’s WordNet. Full sources and licences.