WordNet records no synonym and no antonym for lorentz force. It is the only member of its synset, 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.
the force experienced by a point charge moving along a wire that is in a magnetic field; the force is at right angles to both the current and the magnetic field
“the Lorentz force can be used to suspend a current-carrying object between two magnets”
Synonyms, antonyms and the broader and narrower relations for lorentz force come from Princeton University’s WordNet. Full sources and licences.