The answer is ACCURACY, eight letters. Nine squares wants EXACTNESS and ten wants EXACTITUDE, so this is a clue where counting genuinely settles it. Worth knowing before you write it in: precision and accuracy are treated as interchangeable by puzzles and as two entirely different properties by anyone who measures things for a living.
The synonym a scientist would object to
In ordinary English the two words blur together, and crosswords are written in ordinary English, so ACCURACY is a perfectly fair fill. In measurement they are separate and independent. Accuracy describes how close a reading sits to the true value. Precision describes how closely repeated readings of the same thing agree with each other. You can have either without the other, and the difference is not academic, because the two failures are fixed in completely different ways.
Why a broken scale can still be precise
Picture a bathroom scale that reads two pounds heavy every single time. Step on it ten times and you get the same number ten times, which is outstanding precision, and every one of those numbers is wrong. Now picture a scale that scatters its readings across a four pound range but centers on the correct weight. That one is accurate on average and badly imprecise.
The classic image for this is a target. Shots grouped tightly in one corner are precise and inaccurate. Shots spread evenly around the bullseye are accurate and imprecise. Engineers generally prefer the first problem, because a consistent offset is a systematic error and calibration can subtract it, whereas scatter is random and the only cure is averaging over more readings. That is why a precise instrument with a known bias is a usable instrument, and a wildly inconsistent one is not.
The same distinction is buried in how numbers are written down. Reporting a length as 3.7 centimeters and reporting it as 3.70 centimeters are two different claims, because the trailing zero asserts that the hundredths place was actually measured rather than rounded away. Writing extra digits you did not earn is a claim of precision you cannot support, which is why scientific results carry a stated uncertainty alongside the figure. It is also why a workshop drawing specifies a tolerance rather than a single number: a part is not required to be exactly right, it is required to be wrong by less than a stated amount.
Nice once meant exact, and crosswords remember
NICETY, six letters, shows up on clues in this territory and looks odd to a modern reader, since nice now means pleasant and nothing more. The word arrived in English from a Latin root meaning not knowing, and its earliest English sense was foolish. From there it traveled through fussy and over refined into precise, which is the sense preserved in phrases like a nice distinction or a nice point of law, and then finally softened into the bland compliment it is today. The precise sense is fossilised in nicety and in the expression judged to a nicety, both of which setters still use.
Matching the entry to the blank count
| Letters | Answer | What triggers it |
|---|---|---|
| 5 | RIGOR | Method, scholarship or standards in the clue |
| 5 | EXACT | The clue is doing adjective work |
| 6 | NICETY | Fine distinctions, old fashioned surface |
| 8 | ACCURACY | Plain wording, the default |
| 9 | EXACTNESS | Same sense, one square longer |
| 10 | EXACTITUDE | The formal register at full length |
British puzzles spell the five letter entry RIGOUR, which takes six squares instead, so let the grid decide that one rather than your instinct.
Adjective clues want a different word
English uses precision attributively as well as as a noun, in phrases like precision tool, precision engineering and precision bombing. Setters exploit that, and nothing else accounts for so many solvers staring at a slot that will not take ACCURACY. The tell is length: the adjective fills are short, so a five or six square slot on this clue should send you straight to EXACT rather than to the noun family. Check the clue for a following noun as well, because a clue reading precision instrument is describing a thing, while bare precision is naming a quality.
Frequently asked questions
What is the five letter answer for Precision?
RIGOR in American puzzles, spelled RIGOUR and taking six squares in British ones. If the clue is functioning as an adjective, EXACT also fits five.
Are precision and accuracy really the same thing?
Not in measurement. Accuracy is how close a reading is to the truth, while precision is how consistently repeated readings agree, and an instrument can have one without the other.
Why will ACCURACY not fit my grid?
Most likely the clue is using precision as an adjective, as in precision tool. Adjective senses take much shorter entries, usually EXACT.
