Which to use
“rasto” and “rust” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #38,450
- “rasto” frequency rank
- #46,045
- “rust” frequency rank
- 84495
- confusion score
Side-by-Side Comparison
| Feature | rasto | rust |
|---|---|---|
| Definition | vestígio da passagem de alguém ou de algum animal; indício, pegada, pista | ferrugem |
Where the eye mixes rasto and rust
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses rasto with rust
A purely visual mix-up. rasto (/ˈRaʃ.tu/) 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 differ by 1 letter(s) in length. Our composite confusion score for this pair is 84495, derived from the frequency rank of both members and their visual similarity.
rasto is recorded at frequency rank #38,450, classified as anoun, pronounced /ˈRaʃ.tu/. rust is at rank #46,045, 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 84495, this pair ranks #783 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of rasto vs rust
Shared letters: rst. Private to "rasto": ao. Private to "rust": u.
"rasto" · 5 letters · shape CVCCV · "rust" · 4 letters · shape CVCC
Known mistypes of this pair
Frequently Asked Questions
Do "rasto" and "rust" mean the same thing in a sentence?
In ordinary Portuguese text, does "rasto" or "rust" show up more?
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 "rasto" 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 #783 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "rasto" and "rust" also get mixed up with nearby pairs, the highest-scored neighbour is "ruma 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 #783 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.