Which to use
“r's” and “rust” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #40,861
- “r's” frequency rank
- #10,604
- “rust” frequency rank
- 51465
- confusion score
Side-by-Side Comparison
| Feature | r's | rust |
|---|---|---|
| Definition | plural of r | The deteriorated state of iron or steel as a result of moisture and oxidation; it consists mostly of iron(III) oxide (ferric oxide) and iron(II) oxide (ferrous oxide). |
Letter map: r's vs rust
Shared letters muted; letters that set r's and rust apart highlighted. Shared run: 2.
Spelling & dictionary notes on r's vs rust
r's and rust are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 51465, derived from the frequency rank of both members and their visual similarity.
r's is recorded at frequency rank #40,861, classified as anoun. rust is at rank #10,604, tagged as anoun, pronounced /ɹʌst/.
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 51465, this pair ranks #165,244 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of r's vs rust
Shared letters: rs. Private to "r's": -. Private to "rust": tu.
"r's" · 2 letters · shape CC · "rust" · 4 letters · shape CVCC
Known mistypes of this pair
- rust ← rrust · rsut · russt · rustt · ruts · urst
Frequently Asked Questions
Do "r's" and "rust" mean the same thing in a sentence?
Which is more common, "r's" or "rust"?
What to do next
Done with this confusable. These links stay specific to "r's" and "rust".
- Full dictionary entry for "r's" 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 #165,244 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "r's" and "rust" also get mixed up with nearby pairs, the highest-scored neighbour is "r's vs Rua". 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 #165,244 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.