Which to use
“rubis” and “rus” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #19,143
- “rubis” frequency rank
- #37,537
- “rus” frequency rank
- 56680
- confusion score
Side-by-Side Comparison
| Feature | rubis | rus |
|---|---|---|
| Definition | Pierre précieuse très dure, transparente et d’un rouge plus ou moins vif. Sa formule chimique est Al₂O₃:Cr. | Pluriel de ru. |
Where the eye mixes rubis and rus
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. rubis runs 5 letters (CVCVC) against rus's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between rubis and rus
A purely visual mix-up. rubis (\ʁy.bi\) and rus (\ʁy\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 56680, derived from the frequency rank of both members and their visual similarity.
rubis is recorded at frequency rank #19,143, classified as anoun, pronounced \ʁy.bi\. rus is at rank #37,537, tagged as anoun, pronounced \ʁy\.
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 56680, this pair ranks #119,569 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of rubis vs rus
Shared letters: rsu. Private to "rubis": bi. Private to "rus": -.
"rubis" · 5 letters · shape CVCVC · "rus" · 3 letters · shape CVC
Known mistypes of this pair
- rubis ← rbuis · rrubis · rubbis · rubiss · rubsi · ruibs · urbis
Frequently Asked Questions
Is swapping "rubis" for "rus" ever safe?
Which is more common, "rubis" or "rus"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "rubis" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #119,569 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rubis" and "rus" also get mixed up with nearby pairs, the highest-scored neighbour is "Rhys vs rus". 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 #119,569 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.