Which to use
“ruin” and “rust” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #4,265
- “ruin” frequency rank
- #10,604
- “rust” frequency rank
- 14869
- confusion score
Side-by-Side Comparison
| Feature | ruin | rust |
|---|---|---|
| Definition | The remains of a destroyed or dilapidated construction, such as a house or castle. | 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). |
Where the eye mixes ruin and rust
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: ruin vs rust
A purely visual mix-up. ruin (/ˈɹuː.ɪn/) and rust (/ɹʌst/) 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 14869, derived from the frequency rank of both members and their visual similarity.
ruin is recorded at frequency rank #4,265, classified as anoun, pronounced /ˈɹuː.ɪn/. 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 14869, this pair ranks #467,457 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ruin vs rust
Shared letters: ru. Private to "ruin": in. Private to "rust": st.
"ruin" · 4 letters · shape CVVC · "rust" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "ruin" for "rust" ever safe?
Which is more common, "ruin" or "rust"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ruin" 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 #467,457 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ruin" and "rust" also get mixed up with nearby pairs, the highest-scored neighbour is "Rua 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 #467,457 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.