Which to use
“rou” and “ru” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #48,169
- “rou” frequency rank
- #16,467
- “ru” frequency rank
- 64636
- confusion score
Side-by-Side Comparison
| Feature | rou | ru |
|---|---|---|
| Definition | Synonyme de rohu (poisson). | Petit ruisseau. |
Where the eye mixes rou and ru
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses rou with ru
A purely visual mix-up. rou (\ʁu\) and ru (\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 1 letter(s) in length. Our composite confusion score for this pair is 64636, derived from the frequency rank of both members and their visual similarity.
rou is recorded at frequency rank #48,169, classified as anoun, pronounced \ʁu\. ru is at rank #16,467, 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 64636, this pair ranks #76,083 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of rou vs ru
Shared letters: ru. Private to "rou": o. Private to "ru": -.
"rou" · 3 letters · shape CVV · "ru" · 2 letters · shape CV
Frequently Asked Questions
Do "rou" and "ru" mean the same thing in a sentence?
Which is more common, "rou" or "ru"?
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 "rou" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ru" - compare definitions side by side with the headword page. Word entry
- This pair ranks #76,083 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rou" and "ru" also get mixed up with nearby pairs, the highest-scored neighbour is "rou vs roya". Nearby pair
Confusion rank #76,083 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.