WordNet records no synonym and no antonym for access time. 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.
(computer science) the interval between the time data is requested by the system and the time the data is provided by the drive
“access time is the sum of seek time and rotational latency and command processing overhead”
Synonyms, antonyms and the broader and narrower relations for access time come from Princeton University’s WordNet. Full sources and licences.