WordNet records no synonym and no antonym for somatosense. 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.
any of the sensory systems that mediate sensations of pressure and tickle and warmth and cold and vibration and limb position and limb movement and pain
Synonyms, antonyms and the broader and narrower relations for somatosense come from Princeton University’s WordNet. Full sources and licences.