preciseness has 2 distinct synonyms spread across 2 of its 2 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. Its one recorded opposite is impreciseness.
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 quality of being reproducible in amount or performance
“he handled it with the preciseness of an automaton”
Synonyms, antonyms and the broader and narrower relations for preciseness come from Princeton University’s WordNet. Full sources and licences.