Which to use
“ruby” and “rust” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #19,668
- “ruby” frequency rank
- #37,050
- “rust” frequency rank
- 56718
- confusion score
Side-by-Side Comparison
| Feature | ruby | rust |
|---|---|---|
| Definition | Rubis. | Rouille. |
Where the eye mixes ruby and rust
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: ruby vs rust
A purely visual mix-up. ruby (\ˈɹuː.bi\) 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 56718, derived from the frequency rank of both members and their visual similarity.
ruby is recorded at frequency rank #19,668, classified as anoun, pronounced \ˈɹuː.bi\. 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 56718, this pair ranks #119,358 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ruby vs rust
Shared letters: ru. Private to "ruby": by. Private to "rust": st.
"ruby" · 4 letters · shape CVCV · "rust" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Can "ruby" and "rust" be used interchangeably?
Frequency check: "ruby" vs "rust" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "ruby" 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 #119,358 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "ruby" and "rust" also get mixed up with nearby pairs, the highest-scored neighbour is "rouet vs rust". 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 #119,358 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.