WordNet records no synonym and no antonym for fatty liver. 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.
yellow discoloration as a result of the accumulation of certain fats (triglycerides) in the liver; can be caused by alcoholic cirrhosis or pregnancy or exposure to certain toxins
Synonyms, antonyms and the broader and narrower relations for fatty liver come from Princeton University’s WordNet. Full sources and licences.