anteater has 11 distinct synonyms spread across 6 of its 6 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites
any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites
nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata
small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
Synonyms, antonyms and the broader and narrower relations for anteater come from Princeton University’s WordNet. Full sources and licences.