Which to use
“seio” and “soir” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #8,108
- “seio” frequency rank
- #47,619
- “soir” frequency rank
- 55727
- confusion score
Side-by-Side Comparison
| Feature | seio | soir |
|---|---|---|
| Definition | curvatura, sinuosidade | noite (período entre o anoitecer e a meia-noite) |
Where the eye mixes seio and soir
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. seio (CVVV) and soir (CVVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between seio and soir
A purely visual mix-up. seio (/ˈsɐj.u/) and soir (\swaʁ\) 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 55727, derived from the frequency rank of both members and their visual similarity.
seio is recorded at frequency rank #8,108, classified as anoun, pronounced /ˈsɐj.u/. soir is at rank #47,619, tagged as anoun, pronounced \swaʁ\.
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 55727, this pair ranks #10,424 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of seio vs soir
Shared letters: ios. Private to "seio": e. Private to "soir": r.
"seio" · 4 letters · shape CVVV · "soir" · 4 letters · shape CVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "seio" for "soir" ever safe?
Frequency check: "seio" vs "soir" - 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 "seio" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "soir" - compare definitions side by side with the headword page. Word entry
- This pair ranks #10,424 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "seio" and "soir" also get mixed up with nearby pairs, the highest-scored neighbour is "soap vs soir". 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 #10,424 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.