Synonyms and related words :
accurate, close, constant, correct, delicate, dependable, direct, even, exact, express, faithful, fine, inerrable, infallible, mathematical, micrometrically precise, microscopic, nice, pinpoint, precise, refined, reliable, religious, religiously exact, rigid, rigorous, scientific, scientifically exact, severe, square, strict, subtle, sure, trustworthy, undeviating, unerring