catalectic has no recorded synonym. 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. Its 2 recorded opposites are hypercatalectic, acatalectic.
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.
(prosody) a line of verse that lacks a syllable in the last metrical foot
(verse) metrically incomplete; especially lacking one or more syllables in the final metrical foot
Synonyms, antonyms and the broader and narrower relations for catalectic come from Princeton University’s WordNet. Full sources and licences.