WordNet records no synonym and no antonym for magnetic dipole moment. 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.
(physics) a current loop gives rise to a magnetic field characteristic of a magnetic dipole
“An orbiting electron in an atom will have a magnetic dipole moment”
Synonyms, antonyms and the broader and narrower relations for magnetic dipole moment come from Princeton University’s WordNet. Full sources and licences.