WordNet records no synonym and no antonym for conodont. 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.
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
Synonyms, antonyms and the broader and narrower relations for conodont come from Princeton University’s WordNet. Full sources and licences.