WordNet records no synonym and no antonym for interleave. 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.
intersperse the sectors on the concentric magnetic circular patterns written on a computer disk surface to guide the storing and recording of data
intersperse alternately, as of protective covers for book illustrations
Synonyms, antonyms and the broader and narrower relations for interleave come from Princeton University’s WordNet. Full sources and licences.