Which to use
“rule” and “rust” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #39,521
- “rule” frequency rank
- #37,050
- “rust” frequency rank
- 76571
- confusion score
Side-by-Side Comparison
| Feature | rule | rust |
|---|---|---|
| Definition | Règle (ordre). | Rouille. |
Where the eye mixes rule and rust
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between rule and rust
A purely visual mix-up. rule (\ɹuːl\) and rust (\ɻʌst\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 76571, derived from the frequency rank of both members and their visual similarity.
rule is recorded at frequency rank #39,521, classified as anoun, pronounced \ɹuːl\. rust is at rank #37,050, tagged as anoun, pronounced \ɻʌst\.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 76571, this pair ranks #30,749 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of rule vs rust
Shared letters: ru. Private to "rule": el. Private to "rust": st.
"rule" · 4 letters · shape CVCV · "rust" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Can "rule" and "rust" be used interchangeably?
In ordinary French text, does "rule" or "rust" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "rule" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rust" - compare definitions side by side with the headword page. Word entry
- This pair ranks #30,749 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rule" and "rust" also get mixed up with nearby pairs, the highest-scored neighbour is "râles vs rule". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #30,749 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.