accurate

Synonyms: authentic careful close concrete correct defined definite deft detailed discriminating discriminative distinct exact explicit factual faithful genuine judicious just literal matter-of-fact methodical meticulous on the button on the money on the nose particular proper punctilious punctual regular right rigid rigorous scientific scrupulous severe sharp skillful solid specific strict systematic true ultraprecise unerring unmistakable veracious

Antonyms: careless faulty inaccurate lax vague

Synonyms: absolute actual authentic authoritative certain conclusive definite definitive errorless exact factual faultless final flawless genuine infallible irrefutable official perfect right straight strict true truthful undeniable undisputed unimpeachable unquestionable unrefuted valid veracious

Antonyms: doubtful erroneous false inaccurate misleading mistaken questionable untruthful wrong