WordNet records no synonym and no antonym for corn lily. 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 several South African plants of the genus Ixia having grasslike leaves and clusters of showy variously colored lily-like flowers; widely cultivated
Synonyms, antonyms and the broader and narrower relations for corn lily come from Princeton University’s WordNet. Full sources and licences.