Which to use
“rex” and “roc” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #12,467
- “rex” frequency rank
- #10,935
- “roc” frequency rank
- 23402
- confusion score
Side-by-Side Comparison
| Feature | rex | roc |
|---|---|---|
| Definition | Race de chat, à queue longue ou moyenne et à poil court et ondulé car il n’est constitué que du sous-poil. | Masse de pierre très dure, qui tient au sol. |
Where the eye mixes rex and roc
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: rex vs roc
A purely visual mix-up. rex (\ʁɛks\) and roc (\ʁɔk\) 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 23402, derived from the frequency rank of both members and their visual similarity.
rex is recorded at frequency rank #12,467, classified as anoun, pronounced \ʁɛks\. roc is at rank #10,935, tagged as anoun, pronounced \ʁɔk\.
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 23402, this pair ranks #352,695 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rex vs roc
Shared letters: r. Private to "rex": ex. Private to "roc": co.
"rex" · 3 letters · shape CVC · "roc" · 3 letters · shape CVC
Frequently Asked Questions
Is swapping "rex" for "roc" ever safe?
Which is more common, "rex" or "roc"?
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 "rex" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "roc" - compare definitions side by side with the headword page. Word entry
- This pair ranks #352,695 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "rex" and "roc" also get mixed up with nearby pairs, the highest-scored neighbour is "Reis vs rex". Nearby pair
Confusion rank #352,695 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.