WordNet records no synonym and no antonym for henry ii. 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.
king of France from 1547 to 1559; regained Calais from the English; husband of Catherine de Medicis and father of Charles IX (1519-1559)
first Plantagenet King of England; instituted judicial and financial reforms; quarreled with archbishop Becket concerning the authority of the Crown over the church (1133-1189)
Synonyms, antonyms and the broader and narrower relations for henry ii come from Princeton University’s WordNet. Full sources and licences.